doc: fix log statement in multi namespace example (#4250)

Co-authored-by: Eric Stroczynski <[email protected]>

Author: ricoberger

website/content/en/docs/building-operators/golang/operator-scope.md

@@ -264,7 +264,7 @@ options := ctrl.Options{
 
 // Add support for MultiNamespace set in WATCH_NAMESPACE (e.g ns1,ns2)
 if strings.Contains(watchNamespace, ",") {
-    setupLog.Infof("manager will be watching namespace %q", watchNamespace)
+    setupLog.Info("manager set up with multiple namespaces", "namespaces", watchNamespace)
     // configure cluster-scoped with MultiNamespacedCacheBuilder
     options.Namespace = ""
     options.NewCache = cache.MultiNamespacedCacheBuilder(strings.Split(watchNamespace, ","))