fix: use MIME types for accepted file types capability

Change AcceptedFileTypesCapability to expect MIME types (e.g.
image/png, application/pdf) instead of file extensions. Filament's
acceptedFileTypes() requires MIME types, and using mimetypes validation
rule is more precise than mimes.

Author: ManukMinasyan

src/Validation/Capabilities/AcceptedFileTypesCapability.php

@@ -27,7 +27,7 @@ public function formSchema(string $statePath): array
         return [
             TagsInput::make($statePath.'.accepted_types')
                 ->label('Accepted File Types')
-                ->placeholder('e.g. jpg, png, pdf'),
+                ->placeholder('e.g. image/png, application/pdf'),
         ];
     }
 
@@ -51,6 +51,6 @@ public function toRules(mixed $value): array
             return [];
         }
 
-        return ['mimes:'.implode(',', $types)];
+        return ['mimetypes:'.implode(',', $types)];
     }
 }