update create_repo if space exist

app.py

@@ -53,7 +53,7 @@ def create_space(repo_link, hf_token):
     api = HfApi(token=hf_token)
     repo_url = api.create_repo(
                 repo_id=f'LangChain_{repo_name}Bot',  #example - ysharma/LangChain_GradioBot
-                edit_ok = True,
+                exist_ok = True,
                 repo_type="space",
                 space_sdk="gradio",
                 private=False)