I would like to use some Google fonts but it seems like Odoo is only including a subset of the available fontweights

300,300i,400,400i,700,700i

https://github.com/odoo/odoo/blob/e5e95f37265b4df212e1fe104bc32eb95d55fe80/addons/website/static/src/js/editor/snippets.options.js#L266

Is there a way for example to add '900' without custom modules ?