Update 2.6.2 release notes with a recently merged fix

Change-Id: I833608e02f2104691df4014f2e7f4de3f4b2ff5a

ReleaseNotes/ReleaseNotes-2.6.2.txt

diff --git a/ReleaseNotes/ReleaseNotes-2.6.2.txt b/ReleaseNotes/ReleaseNotes-2.6.2.txt
index 277eba4..9d97848 100644
--- a/ReleaseNotes/ReleaseNotes-2.6.2.txt
+++ b/ReleaseNotes/ReleaseNotes-2.6.2.txt
@@ -47,5 +47,8 @@
 * link:https://code.google.com/p/gerrit/issues/detail?id=2039[Issue 2039]:
 Fix browser NPE when ChangeCache is incomplete.
 
+* link:https://code.google.com/p/gerrit/issues/detail?id=2056[Issue 2056]:
+Display custom NoOp label score for open changes.
+
 No other changes since 2.6.1.