[mutter] Fix typo

[Florian Müllner <fmuellner src gnome org>]

commit fbb2207f8c66a20448d8f95b7adb532995d138df
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Oct 30 17:14:16 2013 +0100

    Fix typo

 NEWS |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index d3ab5aa..77556b5 100644
--- a/NEWS
+++ b/NEWS
@@ -3,7 +3,7 @@
 * Don't require at least one output device to be connected [Giovanni; #709009]
 * Name the guard window [Andrew; #710346]
 * Use new UPower API [Bastien]
-* Expose min-backlight-stea [Asad; #710380]
+* Expose min-backlight-step [Asad; #710380]
 * Don't focus the no-focus-window for globally active windows [Jasper; #710296]
 * Misc. fixes and cleanups [Jasper, Rico, Olav, Magdalen; #709776]