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>
[Cherry-picked d7ff7de][modified]

Author: tgodzik

.github/workflows/ci.yaml

@@ -715,47 +715,6 @@ jobs:
             exit 1
           fi
 
-<<<<<<< backport-lts-3.3-24271
-=======
-      - name: Prepare the SDKs
-        shell: bash
-        run : |
-          prepareSDK() {
-            distroSuffix="$1"
-            sbtProject="$2"
-            distDir="$3"
-
-            # Build binaries
-            ./project/scripts/sbt "all ${sbtProject}/Universal/packageBin ${sbtProject}/Universal/packageZipTarball"
-
-            artifactName="scala3-${{ env.RELEASE_TAG }}${distroSuffix}"
-
-            # Caluclate SHA for each of archive files
-            for file in "${artifactName}.zip" "${artifactName}.tar.gz"; do
-              mv ${distDir}/target/universal/$file $file
-              sha256sum "${file}" > "${file}.sha256"
-            done
-          }
-          prepareSDK ""                      "dist"               "./dist/"
-          prepareSDK "-aarch64-pc-linux"     "dist-linux-aarch64" "./dist/linux-aarch64/"
-          prepareSDK "-x86_64-pc-linux"      "dist-linux-x86_64"  "./dist/linux-x86_64/"
-          prepareSDK "-aarch64-apple-darwin" "dist-mac-aarch64"   "./dist/mac-aarch64/"
-          prepareSDK "-x86_64-apple-darwin"  "dist-mac-x86_64"    "./dist/mac-x86_64/"
-          prepareSDK "-x86_64-pc-win32"      "dist-win-x86_64"    "./dist/win-x86_64/"
-
-      - name: Download MSI package
-        uses: actions/download-artifact@v6
-        with:
-          name: scala.msi
-          path: .
-      - name: Prepare MSI package
-        shell: bash
-        run: |
-          msiInstaller="scala3-${{ env.RELEASE_TAG }}.msi"
-          mv scala.msi "${msiInstaller}"
-          sha256sum "${msiInstaller}" > "${msiInstaller}.sha256"
-
->>>>>>> d7ff7de Bump actions/download-artifact from 5 to 6
       - name: Install GH CLI
         uses: dev-hanz-ops/install-gh-cli-action@v0.2.1
         with: