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_sr_rs.utf-8.vim b/runtime/lang/menu_sr_rs.utf-8.vim
index 3d89168..c1c0dcb 100644
--- a/runtime/lang/menu_sr_rs.utf-8.vim
+++ b/runtime/lang/menu_sr_rs.utf-8.vim
@@ -31,7 +31,7 @@
 menutrans &File			    &Фајл
 menutrans &Open\.\.\.<Tab>:e	    &Отвори\.\.\.<Tab>:e
 menutrans Sp&lit-Open\.\.\.<Tab>:sp &Подели-отвори\.\.\.<Tab>:sp
-menutrans Open\ Tab\.\.\.<Tab>:tabnew	Отвори\ картицу\.\.\.<Tab>:tabnew
+menutrans Open\ &Tab\.\.\.<Tab>:tabnew	Отвори\ картицу\.\.\.<Tab>:tabnew
 menutrans &New<Tab>:enew	    &Нов<Tab>:enew
 menutrans &Close<Tab>:close	    &Затвори<Tab>:close
 menutrans &Save<Tab>:w		    &Сачувај<Tab>:w