fix: ignore unchanged console redirect_uris when adding an instance domain (#6156)

Co-authored-by: Fabi <fabienne@zitadel.com>

internal/command/instance.go

@@ -501,6 +501,9 @@ func (c *Commands) ChangeSystemConfig(ctx context.Context, externalDomain string
 		if err != nil {
 			return err
 		}
+		if len(cmds) == 0 {
+			continue
+		}
 		_, err = c.eventstore.Push(ctx, cmds...)
 		if err != nil {
 			return err