Website: Contrast on webpage difficult to read for code chunks

Looking at the [factors cheatsheet](https://rstudio.github.io/cheatsheets/html/factors.html) webpage, it's very difficult to read some of the code chunks. It's a very light font color on a white background. A screenshot is provided of the code associated with fct_reorder2 <img width="847" height="253" alt="Image" src="https://github.com/user-attachments/assets/b548bd35-416f-4aee-a163-cd538a07f1e1" />