Add a release note (feature)

Comes with the [new, experimental `--full-name-hash` option for `git
repack`](git-for-windows/git#5157) that helps
packing monorepos more tightly.

Signed-off-by: gitforwindowshelper[bot] <gitforwindowshelper-bot@users.noreply.github.com>

ReleaseNotes.md

@@ -46,6 +46,7 @@ Git for Windows is distributed with other components yet, such as Bash, zlib, cu
 * Comes with [OpenSSH v9.9.P1](https://github.com/openssh/openssh-portable/releases/tag/V_9_9_P1).
 * Comes with [MinTTY v3.7.6](https://github.com/mintty/mintty/releases/tag/3.7.6).
 * Comes with [Bash v5.2.37](https://git.savannah.gnu.org/cgit/bash.git/commit/?id=6794b5478f660256a1023712b5fc169196ed0a22).
+* Comes with the [new, experimental `--full-name-hash` option for `git repack`](https://github.com/git-for-windows/git/pull/5157) that helps packing monorepos more tightly.
 
 ## Changes since Git for Windows v2.46.0 (July 29th 2024)