fix: fix a typo of get_customizable_model_schema method name (#14449)

api/core/model_runtime/model_providers/__base/ai_model.py

         :param credentials: model credentials
         :return: model schema
         """
-        return self._get_customizable_model_schema(model, credentials)
 
-    def _get_customizable_model_schema(self, model: str, credentials: dict) -> Optional[AIModelEntity]:
-        """
-        Get customizable model schema and fill in the template
-        """
+        # get customizable model schema
         schema = self.get_customizable_model_schema(model, credentials)
-
         if not schema:
             return None