call values() on the sorted array to reset the keys

without calling `values`, the returned array format in not consistent: sometimes a numbered array if returned (if sort happened to not change the order) or an assoc array (in case sort did actually move items around and kept their index).

src/Taggable.php

@@ -466,7 +466,7 @@ public static function allTags(): array
         /** @var \Illuminate\Database\Eloquent\Collection $tags */
         $tags = static::allTagModels();
 
-        return $tags->pluck('name')->sort()->all();
+        return $tags->pluck('name')->sort()->values()->all();
     }
 
     /**