Describe the bug
Font families using quoted strings don't work (the CSS parser outputs an escaped version)

To Reproduce
Steps to reproduce the behavior:

1. Edit a brand to add custom CSS to it
2. Add a style which has a quoted font-family in it, like so: font-family: "Foo Bar", sans-serif;
3. Observe on the login page that the rendered CSS (using FF DevTools) shows as font-family: "

Expected behavior
The font-family should be "Foo Bar", sans-serif instead of ".

Screenshots
N/A

Logs
N/A

Version and Deployment (please complete the following information):

• authentik version: 2025.4.1
• Deployment: docker-compose

Additional context
The original text doesn't get clobbered so it's probably whatever logic is escaping the CSS.