Disable SonarCloud workflow triggers

Commented out the `on` section in `sonarcloud.yml`, disabling
automatic triggers for `push` and `pull_request` events on
the `main` branch, as well as manual triggers via
`workflow_dispatch`. This prevents the SonarCloud analysis
workflow from running until the triggers are re-enabled.

Author: vp

.github/workflows/sonarcloud.yml

@@ -28,12 +28,12 @@
 
 name: SonarCloud analysis
 
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-  workflow_dispatch:
+# on:
+#   push:
+#     branches: [ "main" ]
+#   pull_request:
+#     branches: [ "main" ]
+#   workflow_dispatch:
 
 permissions:
   pull-requests: read # allows SonarCloud to decorate PRs with analysis results