build(deps): bump actions/upload-artifact from 6 to 7 (#1426)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  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/github-cxx-qt-tests.yml

@@ -123,7 +123,7 @@ jobs:
           verbose: true
       - name: Upload GitHub Actions artifacts of lcov
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: lcov
           path: ./target/debug/lcov.info
@@ -605,7 +605,7 @@ jobs:
 
     - name: Upload GitHub Actions artifacts of sccache debug log
       if: always()
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: sccache_log_${{ matrix.name }}
         path: ${{ matrix.sccache_log_path }}