fix typo in message about "outboud nat rule" (opnsense#7429)

* fix typo in message about "outboud nat rule"

* Removed unused $unqiue_addrs (with typo)

* Restore and fix typo $unique_addrs

src/opnsense/mvc/app/models/OPNsense/Interfaces/Vip.php

@@ -42,7 +42,7 @@ public function performValidation($validateFullModel = false)
     {
         $messages = parent::performValidation($validateFullModel);
 
-        $unqiue_addrs = [];
+        $unique_addrs = [];
         $carp_vhids = [];
         $vips = [];
 
@@ -197,7 +197,7 @@ public function performValidation($validateFullModel = false)
     public function whereUsed($address)
     {
         $relevant_paths = [
-          'nat.outbound.rule.' => gettext('Address %s referenced by outboud nat rule "%s"'),
+          'nat.outbound.rule.' => gettext('Address %s referenced by outbound nat rule "%s"'),
           'nat.rule.' => gettext('Address %s referenced by port forward "%s"'),
         ];
         $usages = [];