ci: Add command to include submodules

.github/workflows/ubuntu-sonarcloud.yml

@@ -16,6 +16,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+          submodules: true
       - name: Install sonar-scanner and build-wrapper
         uses: SonarSource/sonarcloud-github-c-cpp@v2
       - name: Configure Build