Update Gerrit 2.4 ReleaseNotes

Change-Id: Idf9e5f1d57fa83bc991749898275cb6a372e7c17
Signed-off-by: Sasa Zivkov <sasa.zivkov@sap.com>

ReleaseNotes/ReleaseNotes-2.4.txt

diff --git a/ReleaseNotes/ReleaseNotes-2.4.txt b/ReleaseNotes/ReleaseNotes-2.4.txt
index e6d91b5..82f3ed4 100644
--- a/ReleaseNotes/ReleaseNotes-2.4.txt
+++ b/ReleaseNotes/ReleaseNotes-2.4.txt
@@ -70,6 +70,11 @@
 of the change we depend upon. A new patch set containing
 the rebased commit will be produced and added to the
 change.
++
+Rebasing of a change in web UI is restricted to change owner, submitter or
+those with the (new) 'rebase' permission.
+
+* Add a new permission 'rebase' to permit rebasing changes in the web UI
 
 * Make a user's dashboard visible if any of the changes are visible to the
 current user.