[to #46408569]fix: pipeline and trainer user-agent add not replacement.

Link: https://code.alibaba-inc.com/Ali-MaaS/MaaS-lib/codereview/10890156

    * [to #46408569]fix: pipeline and trainer user-agent add not replacement.

modelscope/models/base/base_model.py

@@ -107,9 +107,9 @@ class Model(ABC):
                 )
 
             if invoked_by is not None:
-                invoked_by = {Invoke.KEY: invoked_by}
+                invoked_by = '%s/%s' % (Invoke.KEY, invoked_by)
             else:
-                invoked_by = {Invoke.KEY: Invoke.PRETRAINED}
+                invoked_by = '%s/%s' % (Invoke.KEY, Invoke.PRETRAINED)
             local_model_dir = snapshot_download(
                 model_name_or_path, revision, user_agent=invoked_by)
         logger.info(f'initialize model from {local_model_dir}')