Update notes for submitted changes

* Remove workaround for signing jars using Tycho plugins
* Use https for URL of jgit website
* Fix CI information in pom.xml
* Use gitiles as scm url in pom.xml for browsing source code

1d/6385280f6139ea3ff8a9287ce364dbe0668fe7

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-by: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-at: Mon, 15 Jun 2020 02:12:09 -0400
+Reviewed-on: https://git.eclipse.org/r/164860
+Project: jgit/jgit
+Branch: refs/heads/master

c3/db32d51ac8ca8d58d88a265b03d1e64b14e82f

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-by: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-at: Mon, 15 Jun 2020 02:12:09 -0400
+Reviewed-on: https://git.eclipse.org/r/164862
+Project: jgit/jgit
+Branch: refs/heads/master

c4/0ee7b4b9d1b48e5ae2da2a7a9bbcf90ca6583a

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-by: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-at: Mon, 15 Jun 2020 02:12:09 -0400
+Reviewed-on: https://git.eclipse.org/r/164859
+Project: jgit/jgit
+Branch: refs/heads/master

fa/0f47698a704c7944da8494ab67ea9b32c24880

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-by: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-at: Mon, 15 Jun 2020 02:12:09 -0400
+Reviewed-on: https://git.eclipse.org/r/164861
+Project: jgit/jgit
+Branch: refs/heads/master