Reverting to pre-rename issues link, because that link isn't yet renamed to borgmatic.

README.md

@@ -146,7 +146,7 @@ backups.
 ## Issues and feedback
 
 Got an issue or an idea for a feature enhancement? Check out the [borgmatic
-issue tracker](https://tree.taiga.io/project/witten-borgmatic/issues). In
+issue tracker](https://tree.taiga.io/project/witten-atticmatic/issues). In
 order to create a new issue or comment on an issue, you'll need to [login
 first](https://tree.taiga.io/login).