Fix "All required checks done" CI job to never be skipped (#366)

.github/workflows/ci.yml

@@ -271,12 +271,21 @@ jobs:
   # Virtual job that can be configured as a required check before a PR can be merged.
   all-required-checks-done:
     name: All required checks done
+    if: ${{ always() }}
     needs:
       - check-format
       - test-nuget
     runs-on: ubuntu-latest
     steps:
-      - run: echo "All required checks done"
+      - uses: actions/github-script@v6
+        with:
+          script: |
+            const results = ${{ toJSON(needs.*.result) }};
+            if (results.every(res => res === 'success')) {
+              core.info('All required checks succeeded');
+            } else {
+              core.setFailed('Some required checks failed');
+            }
 
   # Create a GitHub release and publish the NuGet packages to nuget.org when a tag is pushed.
   publish-release: