OmniGears: fix typo

Change-Id: If095fb12d29feff2c79789cacd28d2b59b6d454d
diff --git a/res/values/custom_strings.xml b/res/values/custom_strings.xml
index 7a74107..239b5c9 100644
--- a/res/values/custom_strings.xml
+++ b/res/values/custom_strings.xml
@@ -193,7 +193,7 @@
     <string name="button_backlight_title">Button backlight</string>
     <string name="button_backlight_summary">Configure enablement and brightness</string>
     <string name="button_backlight_on_touch_only_title">Button touch</string>
-    <string name="button_backlight_on_touch_only_summary">Enable backlight with timout only on button touch</string>
+    <string name="button_backlight_on_touch_only_summary">Enable backlight with timeout only on button touch</string>
     <string name="button_timeout_title">Backlight timeout</string>
     <string name="button_timeout_summary">Disabled on value 0</string>
     <string name="button_link_brightness">Link to screen</string>