ci(github): bump actions/upload-artifact from 5 to 6 (#1741)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-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>

.github/workflows/analyze-coverity.yaml

@@ -56,7 +56,7 @@ jobs:
         token: ${{ secrets.COVERITY_SCAN_TOKEN }}
 
     - name: Upload Build Log
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: build-log
         path: cov-int/build-log.txt

.github/workflows/build-check.yaml

@@ -208,7 +208,7 @@ jobs:
 
       - name: Upload ZIP Artifacts
         if: matrix.config.publishArtifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: zeal-${{ env.ZEAL_VERSION }}${{ matrix.config.configurePreset == 'ninja-multi-vcpkg-portable' &&  '-portable' || '' }}-windows-x64.zip
           path: |
@@ -217,7 +217,7 @@ jobs:
 
       - name: Upload MSI Artifacts
         if: matrix.config.publishArtifacts && matrix.config.configurePreset == 'ninja-multi-vcpkg'
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: zeal-${{ env.ZEAL_VERSION }}-windows-x64.msi
           path: |
@@ -252,7 +252,7 @@ jobs:
             qtwebengine5-dev
 
       - name: Upload AppImage
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: zeal-dev-x86_64.AppImage # TODO: Provide real version.
           path: zeal-*.AppImage