Update notes for submitted changes

* Override config http.userAgent from environment GIT_HTTP_USER_AGENT

f3/7aa182e14179479daf8a3a2a8240cd51912af1

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Thomas Wolf <thomas.wolf@paranor.ch>
+Submitted-at: Wed, 07 Oct 2020 04:39:00 -0400
+Reviewed-on: https://git.eclipse.org/r/c/jgit/jgit/+/170319
+Project: jgit/jgit
+Branch: refs/heads/master