docs: Sidebar menu background colors in cupcake and other light themes are too dark

[mikhail-skorikov]

On which page do you see this issue?

https://daisyui.com/components/modal

Describe the issue

In the components sidebar, in my screen at least, the text for the selected component (Modal in the given image) is not clear. The text color and background color don't have a high enough contrast to be user friendly.

What browsers are you seeing the problem on?

All browsers