Fix menu localization not updated for "Open Tab..." item (#12993)

THe menu item "Open Tab..." was changed to "Open &Tab..." in #12895 but
localization files were not updated. Update it here.

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/lang/menu_japanese_japan.932.vim b/runtime/lang/menu_japanese_japan.932.vim
index 530131b..19d095b 100644
--- a/runtime/lang/menu_japanese_japan.932.vim
+++ b/runtime/lang/menu_japanese_japan.932.vim
@@ -39,7 +39,7 @@
 menutrans &File				ƒtƒ@ƒCƒ‹(&F)
 menutrans &Open\.\.\.<Tab>:e		ŠJ‚­(&O)\.\.\.<Tab>:e
 menutrans Sp&lit-Open\.\.\.<Tab>:sp	•ªŠ„‚µ‚ÄŠJ‚­(&L)\.\.\.<Tab>:sp
-menutrans Open\ Tab\.\.\.<Tab>:tabnew	ƒ^ƒuƒy[ƒW‚ÅŠJ‚­<Tab>:tabnew
+menutrans Open\ &Tab\.\.\.<Tab>:tabnew	ƒ^ƒuƒy[ƒW‚ÅŠJ‚­<Tab>:tabnew
 menutrans &New<Tab>:enew		V‹Kì¬(&N)<Tab>:enew
 menutrans &Close<Tab>:close		•‚¶‚é(&C)<Tab>:close
 menutrans &Save<Tab>:w			•Û‘¶(&S)<Tab>:w