fix status dot color selectors in build/system24.css

Currently, the css in `build/system24.css` selects the status dot elements with `has(rect[fill="..."])` and just matches on the colour that it normally would be. This doesn't work when using a reduced saturation in the base discord accessibility settings, as the colour of the dot is slightly different, so every status dot is just transparent and doesn't work. Ex. the normal colour of the green "online" dot is #43A25A. When saturation is at 75%, the colour is now #4F9661, so `.wrapper__44b0c:has(rect[fill='#d83a42'])` (code in main) does not notice it anymore. Instead you can select them with the `aria-label` attribute, which is always the same and works just fine.