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_it_it.latin1.vim b/runtime/lang/menu_it_it.latin1.vim
index d3a6f4a..3192e40 100644
--- a/runtime/lang/menu_it_it.latin1.vim
+++ b/runtime/lang/menu_it_it.latin1.vim
@@ -36,7 +36,7 @@
 
 menut &Open\.\.\.<Tab>:e		&Apri\.\.\.<Tab>:e
 menut Sp&lit-Open\.\.\.<Tab>:sp		A&Pri\ nuova\ finestra\.\.\.<Tab>:sp
-menut Open\ Tab\.\.\.<Tab>:tabnew	Apri\ nuova\ &Linguetta\.\.\.<Tab>:tabnew
+menut Open\ &Tab\.\.\.<Tab>:tabnew	Apri\ nuova\ &Linguetta\.\.\.<Tab>:tabnew
 menut &New<Tab>:enew			&Nuovo<Tab>:enew
 menut &Close<Tab>:close			&Chiudi<Tab>:close
 menut &Save<Tab>:w			&Salva<Tab>:w