Update notes for submitted changes

* Fix stamping to produce stable file timestamps

5d/925ecbb3d0977c586f0001baf20aff12823de9

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Mon, 14 Dec 2020 11:49:32 -0500
+Reviewed-on: https://git.eclipse.org/r/c/jgit/jgit/+/173523
+Project: jgit/jgit
+Branch: refs/heads/stable-5.9