git-gui: Update Japanese translation
git-gui: Update Japanese translation

I updated Japanese translation for the latest git-gui.

Signed-off-by: しらいしななこ <7d97fbf70141dda63063292abadb698cc511a125@bluebottle.com>
Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git