docs: def update(self, tag, **kwds):
          """
          Endpoint: /tag/<id>/update.json
  
          Updates a tag with the specified parameters.
          Returns the updated tag object.
          """
          result = self._client.post("/tag/%s/update.json" %
                                     self._quote_url(self._extract_id(tag)),
                                     **kwds)["result"]
          return Tag(self._client, result)