[FIX] website_mass_mailing: correctly load newsletter snippet

Since [1], the `website_mass_mailing` module would not auto install
itself if the `mass_mailing` module would be installed since a new
dependency was added: `google_recaptcha`.

[1]: https://github.com/odoo/odoo/commit/d4984b81e6b244297e192f2be2768ed11da170aa



task-2455069

closes odoo/odoo#66727

X-original-commit: 2db46129f3749435f2dbff904a5b73168526480a
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>
Co-authored-by: Romain Derie <rde@odoo.com>

addons/website_mass_mailing/__manifest__.py

@@ -21,5 +21,5 @@ On a simple click, your visitors can subscribe to mailing lists managed in the E
     'qweb': [
         'static/src/xml/*.xml',
     ],
-    'auto_install': True,
+    'auto_install': ['website', 'mass_mailing'],
 }