[FIX] website: allow status 308 in redirect double slash

When redirecting when a double slash appears in url, werkzeug >= 2.2.0
redirects with a status 308 instead of a 301.

Part-of: odoo/odoo#112197

addons/website/tests/test_http_endpoint.py

@@ -35,5 +35,5 @@ class TestHttpEndPoint(HttpCase):
 
     def test_redirect_double_slash(self):
         res = self.url_open('/test_http//greeting', allow_redirects=False)
-        self.assertEqual(res.status_code, 301)
+        self.assertIn(res.status_code, (301, 308))
         self.assertEqual(werkzeug.urls.url_parse(res.headers.get('Location', '')).path, '/test_http/greeting')