Site defaults to dark mode even when the browser is set to light mode

[me-it-is]

What's the issue?
Site defaults to dark mode even when the browser is set to light mode

Where?
https://frcsoftware.org/

To Reproduce

1. Change your browsers appearance to light mode
2. Open https://frcsoftware.org/ in a private browsing window
3. Website is in dark mode

Expected behavior
The website should follow the system theme by default

• Browser and version: Firefox 152.0.6
• OS: MacOS

Additional context
https://discord.com/channels/1516145538297368707/1516151527126073434/1532850123392946198