Mention Bug Fix in release notes

It is [now
possible](#303)
to use `wordpad.exe` as Git's editor of choice.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

ReleaseNotes.md

@@ -56,6 +56,7 @@ This package contains software from a number of other projects including Bash, z
 * A [bug](https://github.com/git-for-windows/git/issues/2738) preventing Unicode characters from being used in the window title of Git Bash was fixed.
 * OpenSSH was patched to no longer [warn about an "invalid format"](https://github.com/git-for-windows/git/issues/2743) when private and public keys are stored separately.
 * Non-ASCII output of paged Git commands [is now rendered correctly in Windows Terminal](https://github.com/git-for-windows/git/pull/2834).
+* It is [now possible](https://github.com/git-for-windows/build-extra/pull/303) to use `wordpad.exe` as Git's editor of choice.
 
 ## Changes since Git for Windows v2.27.0 (June 1st 2020)