Correct spelling of "declarations" in faq-04.html

[Dan-Q]

This PR is:

• Adding a new domain
• Updating existing domain size
• Changing domain name
• Removing existing domain from list
• Website code changes (512kb.club site)
• Other not listed

---

The FAQ page currently reads, under "My site doesn't qualify, what can I do?":

1. Replace custom fonts with a local font stack by replacing your font-family declerations in your CSS to one of the following:

There's a typo, resulting in the mis-spelling of the word "declarations". This PR corrects it to:

1. Replace custom fonts with a local font stack by replacing your font-family declarations in your CSS to one of the following:

[garritfra]

Nice, thanks! :)