Refactor import statement in models.py to use double quotes for string interpolation

tabs/images/models.py

@@ -43,7 +43,7 @@ class BaseReq(BaseModel):
     @field_validator('model', 'negative_prompt', 'embeddings', 'clip_skip', 'controlnet_config')
     def check_model(cls, values):
         for m in appConfig.IMAGES_MODELS:
-            gr.Info(f'{m.get('repo_id')} {values.get('model')}')
+            gr.Info(f"{m.get('repo_id')} {values.get('model')}")
             if m.get('repo_id') == values.get('model'):
                 loader = m.get('loader')