Update gitleaks.yaml

Author: Kumaresansyncfusion

.github/workflows/gitleaks.yaml

@@ -29,6 +29,9 @@ jobs:
        uses: actions/setup-dotnet@v3
        with:
           dotnet-version: '3.1.x'
+     - name: Install Mono
+       if: steps.gitleaks.outcome != 'success'
+       run: sudo apt-get update && sudo apt-get install -y mono-complete
      - name: Install the report tool packages
        if: steps.gitleaks.outcome != 'success'
        run: |