add missing return from #14142

Author: jasonvarga

src/View/Debugbar/VariableCollector.php

@@ -24,5 +24,7 @@ public function useHtmlVarDumper($value = true)
         if (method_exists(parent::class, 'useHtmlVarDumper')) {
             return parent::useHtmlVarDumper($value);
         }
+
+        return $this;
     }
 }