Try with suggestion from actions/runner-images@9811

Author: michael-jabbour-sonarsource

.github/workflows/build.yml

@@ -26,6 +26,8 @@ jobs:
           xcodebuild test -project macos-xcode.xcodeproj -scheme test2 -enableCodeCoverage YES -derivedDataPath build
       - name: Collect coverage into one XML report
         run: |
+          # Needed to use xcrun on github actions runner. See https://github.com/actions/runner-images/issues/9811.
+          sudo xcode-select -s /Library/Developer/CommandLineTools
           bash xccov-to-generic.sh build/Logs/Test/*.xcresult/ > generic-coverage.xml
       - name: SonarQube Scan
         uses: SonarSource/sonarqube-scan-action@v4