Update StoryApiV1Controller, update error messsage

app/Http/Controllers/Stories/StoryApiV1Controller.php

@@ -448,7 +448,7 @@ class StoryApiV1Controller extends Controller
                             case 'text':
                                 if (! preg_match('/^[a-zA-Z0-9\s\p{P}\p{S}]*$/u', $content)) {
                                     throw ValidationException::withMessages([
-                                        "overlays.{$index}.content" => 'Text overlays can only contain letters, numbers, spaces, commas, and dots.',
+                                        "overlays.{$index}.content" => 'Text overlays contain unsupported characters.',
                                     ]);
                                 }
                                 break;