fix deployment id is None error

agentverse/llms/openai.py

@@ -45,7 +45,7 @@ else:
 
 class OpenAIChatArgs(BaseModelArgs):
     model: str = Field(default="gpt-3.5-turbo")
-    deployment_id: str = Field(default=None)
+    deployment_id: str = Field(default="")
     max_tokens: int = Field(default=2048)
     temperature: float = Field(default=1.0)
     top_p: int = Field(default=1)
@@ -341,6 +341,6 @@ def get_embedding(text: str, attempts=3) -> np.array:
             )["data"][0]["embedding"]
         return tuple(embedding)
     except Exception as e:
-        attempt += 1
+        attempts += 1
         logger.error(f"Error {e} when requesting openai models. Retrying")
         raise