Bump actions/download-artifact from 7 to 8 (#1297)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  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/pull-request.yml

@@ -108,7 +108,7 @@ jobs:
     if: always()
     steps:
       - name: "Download report"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: report-master
           path: _report

.github/workflows/scan-for-updates.yml

@@ -122,7 +122,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: "Download metadata from previous job"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: metadata
 

.github/workflows/test-all.yml

@@ -264,7 +264,7 @@ jobs:
           echo "c++ -march=native: $(tools/compiler_arch.sh c++)"
 
       - name: "Download GAP from previous job"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: gap-${{ needs.build.outputs.artifact }}
 

.github/workflows/update-latest-report.yml

@@ -41,7 +41,7 @@ jobs:
         run: python -m pip install -r tools/requirements.txt
 
       - name: "Download report"
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: report-${{ github.event.inputs.which-gap || inputs.which-gap }}
           path: _report