Bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/mac.yml

@@ -64,7 +64,7 @@ jobs:
           brew install ninja mpich llvm libomp openssl
           brew link libomp --overwrite --force
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: macos-clang-install
       - name: Extract installed package
@@ -95,7 +95,7 @@ jobs:
           brew install ninja mpich llvm libomp openssl
           brew link libomp --overwrite --force
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: macos-clang-install
       - name: Extract installed package

.github/workflows/pages.yml

@@ -45,7 +45,7 @@ jobs:
         run: |
           python3 -m pip install -r docs/requirements.txt
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: doxygen-documentation-xml
           path: xml
@@ -78,7 +78,7 @@ jobs:
           python3 -m pip install -r requirements.txt
           python3 -m pip install -r scoreboard/requirements.txt
       - name: Download performance data
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: perf-stat
       - name: Extract performance data
@@ -115,17 +115,17 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: sphinx-documentation
           path: ./
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: scoreboard
           path: ./scoreboard/
       - name: Download coverage artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: cov-report
           path: ./coverage/

.github/workflows/perf.yml

@@ -19,7 +19,7 @@ jobs:
         run: |
           python3 -m pip install -r requirements.txt --break-system-packages --ignore-installed
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-gcc-install-ubuntu-24.04
       - name: Extract installed package
@@ -57,7 +57,7 @@ jobs:
           brew link libomp --overwrite --force
           python3 -m pip install -r requirements.txt --break-system-packages
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: macos-clang-install
       - name: Extract installed package

.github/workflows/ubuntu.yml

@@ -73,7 +73,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-gcc-install-${{ matrix.os }}
       - name: Extract installed package
@@ -105,7 +105,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-gcc-install-${{ matrix.os }}
       - name: Extract installed package
@@ -174,7 +174,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-clang-install-${{ matrix.os }}
       - name: Extract installed package
@@ -206,7 +206,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-clang-install-${{ matrix.os }}
       - name: Extract installed package
@@ -279,7 +279,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-clang-sanitizer-install-${{ matrix.os }}
       - name: Extract installed package
@@ -317,7 +317,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: ubuntu-clang-sanitizer-install-${{ matrix.os }}
       - name: Extract installed package

.github/workflows/windows.yml

@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/setup-windows-toolchain
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: windows-msvc-install
       - name: Extract installed package
@@ -75,7 +75,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/setup-windows-toolchain
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: windows-msvc-install
       - name: Extract installed package
@@ -137,7 +137,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/setup-windows-toolchain
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: windows-clang-install
       - name: Extract installed package
@@ -158,7 +158,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: ./.github/actions/setup-windows-toolchain
       - name: Download installed package
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: windows-clang-install
       - name: Extract installed package