Update GitHub Pages Takeover Detection Templates to Reflect New GitHub Policy

[adityaax]

Nuclei version: v3.3.0

Nuclei command: nuclei -l subDomains -t ~/nuclei-templates/http/takeovers -rl 40

Current Behavior: Nuclei currently indicates that a domain is vulnerable to GitHub Pages takeover.

Expected Behavior: However, after researching GitHub's updated policy, I found that the domain cannot be taken over due to the new requirement for domain verification through DNS TXT records.

Steps To Reproduce:

1. Run nuclei (subDomains contain list of subdomains)-
   nuclei -l subDomains -t ~/nuclei-templates/http/takeovers -rl 40
2. See the output-
   [github-takeover] [http] [high] https://giant.particle.io
3. Go to https://github.com/EdOverflow/can-i-take-over-xyz and this will show 'edge case' for subdomain takeover throught Github pages.
4. Go to Github > Create a public repository > Go to pages > Go to github actions > Add custom domain > Paste the domain you got from nuclei result
5. See the error- You must verify your domain giant.particle.io before being able to use it. Check out https://docs.github.com/pages/configuring-a-custom-domain-for-your-github-pages-site/verifying-your-custom-domain-for-github-pages for more information.
6. Review the document in reference section.

Anything else: https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site/verifying-your-custom-domain-for-github-pages

[princechaddha]

Hello, the response time for this issue was longer than usual because the team was traveling for DEFCON. The team will respond to this issue shortly. Thank you for your contribution