Fix Changelog entry to link to amoffat#665, not amoffat#655.

Author: tartley

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## 2.0.4 - 5/13/22
 
-- Allow `ok_code` to be used with `fg` [#655](https://github.com/amoffat/sh/pull/655)
+- Allow `ok_code` to be used with `fg` [#665](https://github.com/amoffat/sh/pull/665)
 - Make sure `new_group` never creates a new session [#675](https://github.com/amoffat/sh/pull/675)
 
 ## 2.0.2 / 2.0.3 (misversioned) - 2/13/22