Mention Bug Fix in release notes

When Git indicates an unsafe directory due to the file system
(e.g. FAT32) being unable to record ownership, Git [now gives better
hints](git-for-windows/git#3887).

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

Author: dscho

ReleaseNotes.md

@@ -60,6 +60,7 @@ This package contains software from a number of other projects including Bash, z
 * A crash when running Git for Windows in Wine [was fixed](https://github.com/git-for-windows/git/pull/3875).
 * A bug in the interaction between FSCache and parallel checkout [was fixed](https://github.com/git-for-windows/git/pull/3909).
 * Cloning to network shares failed on some network file systems, which was [fixed](https://github.com/git-for-windows/git/pull/3646).
+* When Git indicates an unsafe directory due to the file system (e.g. FAT32) being unable to record ownership, Git [now gives better hints](https://github.com/git-for-windows/git/pull/3887).
 
 ## Changes since Git for Windows v2.36.0 (April 20th 2022)