Icons missing from buttons example

[MaciejKus]

Describe the bug
The Font Awesome icons are not being displayed in the Buttons with icons example on https://purecss.io/buttons/

To Reproduce
Steps to reproduce the behavior:

1. open https://purecss.io/buttons/
2. view the buttons in the Buttons with icons section

Expected behavior
buttons should display icons and text. they are missing the icons.

Screenshots

Desktop (please complete the following information):

• OS: MacOS 11.6
• Browser: tested on FireFox (95.0.2) and Chrome (96.0.4664.110)

[redonkulus]

@MaciejKus Thanks for the report, this was missed when migrating to docusaurus, should be fixed now.