fix watch func

Author: pooknull

percona/controller/pgcluster/controller.go

@@ -177,7 +177,7 @@ func (r *PGClusterReconciler) watchEnvFromSecrets() handler.TypedEventHandler[cl
 
 		var clusters v2.PerconaPGClusterList
 		if err := r.Client.List(ctx, &clusters, client.MatchingFields{
-			v2.IndexFieldEnvFromSecrets: client.ObjectKeyFromObject(secret).String(),
+			v2.IndexFieldEnvFromSecrets: secret.Name,
 		}); err != nil {
 			log.Error(err, "Failed to list clusters by env from secrets index failed", "key", client.ObjectKeyFromObject(secret).String())
 			return nil