Stop allowing positional arguments for API.update_profile_image

Stop allowing positional arguments besides filename for API.update_profile_image

tweepy/api.py

@@ -823,7 +823,7 @@ def rate_limit_status(self, **kwargs):
         )
 
     @payload('user')
-    def update_profile_image(self, filename, *args, file=None, **kwargs):
+    def update_profile_image(self, filename, *, file=None, **kwargs):
         """ :reference: https://developer.twitter.com/en/docs/accounts-and-users/manage-account-settings/api-reference/post-account-update_profile_image
         """
         if file is not None: