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_sl_si.utf-8.vim b/runtime/lang/menu_sl_si.utf-8.vim
index e219130..10e2541 100644
--- a/runtime/lang/menu_sl_si.utf-8.vim
+++ b/runtime/lang/menu_sl_si.utf-8.vim
@@ -21,7 +21,7 @@
 menutrans &File				&Datoteka
 menutrans &Open\.\.\.<Tab>:e		&Odpri\ \.\.\.<Tab>:e
 menutrans Sp&lit-Open\.\.\.<Tab>:sp	Odpri\ de&ljeno\ \.\.\.<Tab>:sp
-menutrans Open\ Tab\.\.\.<Tab>:tabnew	Odpri\ v\ zavi&hku\ \.\.\.<Tab>:tabnew
+menutrans Open\ &Tab\.\.\.<Tab>:tabnew	Odpri\ v\ zavi&hku\ \.\.\.<Tab>:tabnew
 menutrans &New<Tab>:enew		&Nova<Tab>:enew
 menutrans &Close<Tab>:close		&Zapri<Tab>:close
 menutrans &Save<Tab>:w			&Shrani<Tab>:w