Fix documentation comment

include/git2/remote.h

@@ -183,7 +183,8 @@ GIT_EXTERN(int) git_remote_ls(git_remote *remote, git_headlist_cb list_cb, void
  * filename will be NULL and the function will return success.
  *
  * @param remote the remote to download from
- * @param filename where to store the temporary filename
+ * @param bytes buffer that receives the number of bytes transferred (updated
+ * while transfer is in progress)
  * @param progress_cb function to call with progress information.  Be aware that
  * this is called inline with network and indexing operations, so performance
  * may be affected.