[Website] Colour contrast of the cheat sheet and changelog pages is very inaccessible
#### 🗹 Requirements

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- [x] I have searched the [issues](https://github.com/ryanoasis/nerd-fonts/issues) for my issue and found nothing related and/or helpful
- [x] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
- [x] I have searched the [Wiki](https://github.com/ryanoasis/nerd-fonts/wiki) for help


#### 🎯 Subject of the issue

Experienced behavior:
The eye-watering colour contrast of these pages significantly harms my (and probably others') user experience. And I don't even have any vision impairments; users with such conditions are probably even more hindered.

Expected behavior:
For the colour contrasts to be easy on the eyes of users. The probably least subjective way to achieve this would be to comply with APCA (or at least WCAG AA) standards.

Cheat sheet page: https://www.myndex.com/APCA/?BG=75715e&TXT=0fbfcf&DEV=G4g&BUF=A22
* Currently APCA Lc -30.2.
* The minimum would be Lc -60 for the text and Lc -45 for the icons.

Changelog page: https://www.myndex.com/APCA/?BG=ff8b25&TXT=ffffff&DEV=G4g&BUF=A22

* Currently APCA Lc -50.5.
* It would need at least APCA Lc -60 for the text to be easily legible at that size.

See the "APCA Guidelines: Bronze Level" dropdown on that comparison website for explanations of the contrast levels appropriate based on usage.

Example symbols:
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#### 🔧 Your Setup

- _Which font are you using (e.g. `Anonymice Powerline Nerd Font Complete.ttf`)?_
   - —
- _Where did you get the file from (download link, self patched, source downloaded from link...)_
   - —
- _Which terminal emulator are you using (e.g. `iterm2`, `urxvt`, `gnome`, `konsole`)?_
   - —
- _Are you using OS X, Linux or Windows? And which specific version or distribution?_
   - —

#### ★ Screenshots (Optional)

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