[clutter/clutter-1.22] docs: Mention ClutterRequestMode in the release notes

[Emmanuele Bassi <ebassi src gnome org>]

commit 05a940fa5e12ab065f827ed32af17e7335ca9fb6
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Dec 15 23:42:12 2014 +0000

    docs: Mention ClutterRequestMode in the release notes

 README.in |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/README.in b/README.in
index 70938ab..1dba0c0 100644
--- a/README.in
+++ b/README.in
@@ -303,6 +303,13 @@ Relevant information for developers with existing Clutter applications
 wanting to port to newer releases (see NEWS for general information on new
 features).
 
+Release Notes for Clutter 1.22
+-------------------------------------------------------------------------------
+
+• The ClutterRequestMode enumeration has a new value. Code checking for the
+  values of ClutterRequestMode should already be resilient to changes to this
+  enumerations, like for all enumerations in Clutter.
+
 Release Notes for Clutter 1.20
 -------------------------------------------------------------------------------