zhipu embedding token method (#1976)

Co-authored-by: jyong <jyong@dify.ai>

api/core/model_runtime/model_providers/zhipuai/text_embedding/text_embedding.py

@@ -55,7 +55,7 @@ class ZhipuAITextEmbeddingModel(_CommonZhipuaiAI, TextEmbeddingModel):
         
         total_num_tokens = 0
         for text in texts:
-            total_num_tokens += len(_get_token_ids_default_method(text))
+            total_num_tokens += self._get_num_tokens_by_gpt2(text)
 
         return total_num_tokens