Update reference to 24-hour clock

Change-Id: Ic864fae4fda9707fc84d6d8b33587863b7664e1e
diff --git a/gui/devices/watch/res/watch.xml b/gui/devices/watch/res/watch.xml
index 5040b11..26cf2d5 100644
--- a/gui/devices/watch/res/watch.xml
+++ b/gui/devices/watch/res/watch.xml
@@ -2399,7 +2399,7 @@
 			<object type="checkbox">
 				<placement x="%col1_x%" y="%row4_text_y%" />
 				<font resource="font" color="%text_color%" />
-				<text>Use Military Time.</text>
+				<text>Use 24-hour clock.</text>
 				<data variable="tw_military_time" />
 				<image checked="checkbox_true" unchecked="checkbox_false" />
 			</object>