Update README

README.md

@@ -21,7 +21,7 @@ from towhee import pipe, ops, DataCollection
 
 p = pipe.input('collection_name', 'text')  \
     .map('text', 'vec', ops.sentence_embedding.transformers(model_name='all-MiniLM-L12-v2'))  \
-    .flat_map(('collection_name', 'vec'), 'rows', ops.ann_search.milvus_client(host='127.0.0.1', port='19530', **{'output_fields': ['text']}))  \
+    .map(('collection_name', 'vec'), 'rows', ops.ann_search.osschat_milvus(host='127.0.0.1', port='19530', **{'output_fields': ['text']}))  \
     .map('rows', ('id', 'score', 'text'), lambda x: (x[0], x[1], x[2]))  \
     .output('id', 'score', 'text')
 
@@ -39,7 +39,7 @@ from towhee import pipe, ops, DataCollection
 
 p = pipe.input('collection_name', 'text')  \
     .map('text', 'vec', ops.sentence_embedding.transformers(model_name='all-MiniLM-L12-v2'))  \
-    .map(('collection_name', 'vec'), 'rows', ops.ann_search.milvus_client(host='127.0.0.1', port='19530', **{'output_fields': ['text']}))  \
+    .map(('collection_name', 'vec'), 'rows', ops.ann_search.osschat_milvus(host='127.0.0.1', port='19530', **{'output_fields': ['text']}))  \
     .output('rows')
 
 DataCollection(p('test_collection', 'cat')).show()