Update notes for submitted changes

* PackFile: Add id + ext based constructors
* GC: deleteOrphans: Use PackFile

09/3020864f06b75708f8ec225e5df9e0ad54f9c1

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+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: Sat, 06 Mar 2021 19:26:51 -0500
+Reviewed-on: https://git.eclipse.org/r/c/jgit/jgit/+/177191
+Project: jgit/jgit
+Branch: refs/heads/master

2a/6b2eddcfac17ef5ff3b6b28dfaadd83e34956a

@@ -0,0 +1,7 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Sat, 06 Mar 2021 19:26:51 -0500
+Reviewed-on: https://git.eclipse.org/r/c/jgit/jgit/+/177192
+Project: jgit/jgit
+Branch: refs/heads/master