test: fix skip message for test-macos-app-sandbox

PR-URL: #38114
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

test/parallel/test-macos-app-sandbox.js

@@ -1,7 +1,7 @@
 'use strict';
 const common = require('../common');
 if (process.platform !== 'darwin')
-  common.skip('App Sandbox is only avaliable on Darwin');
+  common.skip('App Sandbox is only available on Darwin');
 
 const fixtures = require('../common/fixtures');
 const tmpdir = require('../common/tmpdir');