Merge pull request #27 from codycjy/fix-add-embedding-model-v4

fix: add embedding v4 model

Author: kevinlin09

dashscope/embeddings/text_embedding.py

@@ -15,6 +15,7 @@ class Models:
         text_embedding_v1 = 'text-embedding-v1'
         text_embedding_v2 = 'text-embedding-v2'
         text_embedding_v3 = 'text-embedding-v3'
+        text_embedding_v4 = 'text-embedding-v4'
 
     @classmethod
     def call(cls,