Bump actions/download-artifact from 4 to 6 (#1214)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -131,27 +131,27 @@ jobs:
           cat RELEASE-NOTES
 
       - name: Download binaries (x86_64-apple-darwin.macos)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: x86_64-apple-darwin.macos
 
       - name: Download binaries (.macos)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: .macos
 
       - name: Download binaries (x86_64-unknown-linux-gnu.linux)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: x86_64-unknown-linux-gnu.linux
 
       - name: Download binaries (.linux)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: .linux
 
       - name: Download binaries (x86_64-pc-windows-msvc.windows)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: x86_64-pc-windows-msvc.windows