Update notes for submitted changes

* Use Instant for smudge time in DirCache and DirCacheEntry

d8/d94272770352515c129ad6d980f2b6e8179409

@@ -0,0 +1,8 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Code-Review+2: Christian Halstrick <christian.halstrick@sap.com>
+Submitted-by: Christian Halstrick <christian.halstrick@sap.com>
+Submitted-at: Thu, 18 Jul 2019 06:59:48 -0400
+Reviewed-on: https://git.eclipse.org/r/146284
+Project: jgit/jgit
+Branch: refs/heads/stable-5.1