Update AvatarController, fix store bug

app/Http/Controllers/Api/BaseApiController.php

@@ -183,7 +183,7 @@ class BaseApiController extends Controller
     {
         abort_if(!$request->user(), 403);
         $this->validate($request, [
-            'upload'   => 'required|mimetypes:jpeg,png,gif|max:'.config('pixelfed.max_avatar_size'),
+            'upload'   => 'required|mimetypes:image/jpeg,image/jpg,image/png|max:'.config('pixelfed.max_avatar_size'),
         ]);
 
         try {

app/Http/Controllers/AvatarController.php

@@ -19,7 +19,7 @@ class AvatarController extends Controller
     public function store(Request $request)
     {
         $this->validate($request, [
-          'avatar' => 'required|mimetypes:jpeg,png|max:'.config('pixelfed.max_avatar_size'),
+          'avatar' => 'required|mimetypes:image/jpeg,image/jpg,image/png|max:'.config('pixelfed.max_avatar_size'),
         ]);
 
         try {