Default Web IDE of Gitlab is not anymore mono fonts. Can this be reverted or changed?

After we upgraded gitlab to Omnibus v15.11.9, we noticed that the default Web IDE is not anymore mono fonts. We disabled vscode integration for security reasons. We are using the free version.

Fonts are not configurable options in Gitlab as far as Iā€™m aware. You could change font settings in your web browser though to display things differently.