Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [actions/cache](https://github.com/actions/cache) and [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `actions/cache` from 4 to 5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

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

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-test.yml

@@ -42,7 +42,7 @@ jobs:
       with:
         dotnet-version: '9.x'
     - name: Cache/Restore NuGets
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         save-always: true
         path:
@@ -124,13 +124,13 @@ jobs:
           -reportTypes:htmlInline
     - name: Upload code coverage report to artifacts
       if: matrix.os == 'ubuntu-latest' && steps.even-if-tests-fail.outputs.condition == 'true' && always()
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ env.CODE_COVERAGE_ARTIFACT_NAME }}
         path: ${{ steps.code-coverage-report-generator.outputs.test-coverage-report-dir }}
     - name: Upload test results to artifacts
       if: matrix.os == 'ubuntu-latest' && steps.even-if-tests-fail.outputs.condition == 'true' && always()
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ env.TEST_RESULTS_ARTIFACT_NAME }}
         path: ${{ steps.dotnet-test.outputs.test-results-dir }}