Add a release note (feature)

The previously-experimental `--full-name-hash` option has been accepted
into upstream Git as `--name-hash-version=2` and is no longer
experimental.

Signed-off-by: gitforwindowshelper[bot] <[email protected]>

Author: gitforwindowshelper[bot]

ReleaseNotes.md

@@ -49,6 +49,7 @@ Git for Windows v2.48.1 was the last version to ship with the i686 ("32-bit") va
 
 * Comes with [OpenSSH v9.9.P2](https://github.com/openssh/openssh-portable/releases/tag/V_9_9_P2).
 * Comes with [PCRE2 v10.45](https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.45).
+* The previously-experimental `--full-name-hash` option has been accepted into upstream Git as `--name-hash-version=2` and is no longer experimental.
 
 ### Bug Fixes