[to #42322933] update nlp models name in metainfo

Link: https://code.alibaba-inc.com/Ali-MaaS/MaaS-lib/codereview/9134657

modelscope/metainfo.py

@@ -13,7 +13,7 @@ class Models(object):
 
     # nlp models
     bert = 'bert'
-    palm2_0 = 'palm2.0'
+    palm = 'palm-v2'
     structbert = 'structbert'
 
     # audio models

modelscope/models/nlp/palm_for_text_generation.py

@@ -8,7 +8,7 @@ from ..builder import MODELS
 __all__ = ['PalmForTextGeneration']
 
 
-@MODELS.register_module(Tasks.text_generation, module_name=Models.palm2_0)
+@MODELS.register_module(Tasks.text_generation, module_name=Models.palm)
 class PalmForTextGeneration(Model):
 
     def __init__(self, model_dir: str, *args, **kwargs):