docs: improved sftp limitations

Added a link to `--sftp-path-override` for a better solution with working hash calculation.

Author: michaelkebe

docs/content/sftp.md

@@ -1108,7 +1108,8 @@ Properties:
 
 On some SFTP servers (e.g. Synology) the paths are different
 for SSH and SFTP so the hashes can't be calculated properly.
-For them using `disable_hashcheck` is a good idea.
+You can either use [`--sftp-path-override`](#--sftp-path-override)
+or [`disable_hashcheck`](#--sftp-disable-hashcheck).
 
 The only ssh agent supported under Windows is Putty's pageant.