Update notes for submitted changes

* reftable: add random suffix to table names

b8/32b068d2efdf09edf29d015748039b5be27e76

@@ -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: Fri, 05 Feb 2021 19:43:42 -0500
+Reviewed-on: https://git.eclipse.org/r/c/jgit/jgit/+/175327
+Project: jgit/jgit
+Branch: refs/heads/master