Add Release Note (bug): When using the cache credential helper, it could error out with "fatal: unable to connect to cache daemon: Unknown error" under certain circumstances; This [was fixed](https://github.com/git-for-windows/git/pull/5329).

Add Release Note (bug): When using the cache credential helper, it could error out with "fatal: unable to connect to cache daemon: Unknown error" under certain circumstances; This [was fixed](https://github.com/git-for-windows/git/pull/5329). #160