Update code freeze and release target date for 2.3

Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Icf0a5737852e4f025dd8ce3748594ad25da43045
diff --git a/docs/about/release-information.rst b/docs/about/release-information.rst
index c230e60..fb1e39b 100644
--- a/docs/about/release-information.rst
+++ b/docs/about/release-information.rst
@@ -40,7 +40,7 @@
 +-----------------+---------------------------+------------------------------+
 | v2.2            | 4th week of Oct '19       | 1st week of Oct '19          |
 +-----------------+---------------------------+------------------------------+
-| v2.3            | 4th week of Mar '20       | 1st week of Mar '20          |
+| v2.3            | 4th week of Apr '20       | 1st week of Apr '20          |
 +-----------------+---------------------------+------------------------------+
 
 Removal of Deprecated Interfaces
@@ -65,4 +65,4 @@
 
 --------------
 
-*Copyright (c) 2018-2019, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2018-2020, Arm Limited and Contributors. All rights reserved.*