sonarExecuteScan: update documentation (#4930)

* sonarExecuteScan: update documentation

* Jenkins only

* Jenkins only

Author: vstarostin

cmd/sonarExecuteScan_generated.go

@@ -35,7 +35,8 @@ spec:
           - name: host
           - name: sonarServerUrl
         type: string
-        description: "The URL to the Sonar backend."
+        description: "The URL to the Sonar backend.
+          Jenkins only: The serverUrl parameter requires the [`instance`](#instance) parameter to be explicitly set to an empty string, as it will have no effect otherwise."
         scope:
           - PARAMETERS
           - STAGES