Use @v4 for actions/{upload,download}-artifact

This will pick the latest available v4 for both actions without us
needing to care about exact version numbers. Should fix the clang-tidy
action.

.github/workflows/clang-tidy.yaml

@@ -60,7 +60,7 @@ jobs:
         run: |
           run-clang-tidy -p build | ./codacy-clang-tidy >report.json
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: clang-tidy-report
           path: report.json
@@ -72,7 +72,7 @@ jobs:
     needs: run
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v4.1.7
+      - uses: actions/download-artifact@v4
         with:
           name: clang-tidy-report