Need to change "i class" on a Wordpress website

Hi there,

I have a Wordpress website using Salient Theme, where the footer displays three icons (fontawesome icons).

I need to change the first icon, so instead of Facebook it shows the Etsy icon.
So, instead of <i class="fa fa-facebook"... it needs to be <i class="fa-brands fa-etsy"...

It needs to be done within the existing Code Snippets plugin or any other editable way that we can both agree before starting.
Please see screenshot detailing the task.
Any questions please ask, thank you!
IMPORTANT: this is a fixed price project, it's a simple task for which I can pay up to 10EUR.
Please do not get in touch if your offer is higher than 10EUR.

Thank you!