Update notes for submitted changes

* GpgKeyLocator: Return a signing key for a user instead of the master key

09/02e060f737324434ec019f7d68d1320f733416

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+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Gunnar Wagenknecht <gunnar@wagenknecht.org>
+Submitted-by: Gunnar Wagenknecht <gunnar@wagenknecht.org>
+Submitted-at: Tue, 22 Oct 2019 01:22:26 -0400
+Reviewed-on: https://git.eclipse.org/r/151413
+Project: jgit/jgit
+Branch: refs/heads/master