NO-TCIKET fix bad smells - error strings should not be capitalized (#16930)

Automatic Merge

plugin/supervisor.go

@@ -122,8 +122,7 @@ func (sup *supervisor) PerformHealthCheck() error {
 			}
 		}
 		if pingErr != nil {
-			mlog.Debug("Error pinging plugin", mlog.Err(pingErr))
-			return fmt.Errorf("Plugin RPC connection is not responding")
+			return fmt.Errorf("plugin RPC connection is not responding")
 		}
 	}