Update sites.yml

[ardakgul]

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

• I used the exact uncompressed size of the site
• I have included a link to the Cloudflare report
• This site is not an ultra minimal site
• The following information is filled identical to the data file

I confirm that I have read the FAQ section, particularly the two red items around minimal pages and inappropriate content and I attest that this site is neither of these things.

• Check to confirm

- domain: ardakgul.com
  url: https://ardakgul.com
  size: 3.899
  last_checked:2025-01-04

Cloudflare Report: https://radar.cloudflare.com/scan/8d27ad20-bf97-4003-8017-4b5f8c6ac450/network