Add Subhunt to DNS section

Link: https://github.com/ahmadouniass/Subdomains-finder-subhunt

Adding Subhunt to the DNS section (alphabetical position: after Merklemap).

Subhunt is an open-source Python CLI tool for passive subdomain enumeration. It queries three sources simultaneously — crt.sh Certificate Transparency logs, HackerTarget, and RapidDNS — merges and deduplicates results, and optionally probes each discovered subdomain for HTTP/HTTPS liveness, returning status codes ([200], [301], [DEAD]). Results export to TXT, JSON, or CSV. Fully passive recon, zero active scanning.

Change

In the DNS section, after Merklemap:

  - [Merklemap](https://www.merklemap.com) - Discover and enumerate all subdomains associated with a website, including those not publicly advertised. Works by ingesting certificate transparency logs.
+ - [Subhunt](https://github.com/ahmadouniass/Subdomains-finder-subhunt) - Multi-source subdomain enumeration tool querying crt.sh Certificate Transparency logs, HackerTarget, and RapidDNS. Merges and deduplicates results, probes each subdomain for HTTP/HTTPS liveness with status codes, and exports to TXT/JSON/CSV.

Checklist

• I have read the Contribution Guidelines
• I have read the awesome manifesto
• This entry is not a duplicate
• Entry is inserted alphabetically (S after M)
• Format follows [Name](link) - description.
• Title is capitalized
• This is an individual pull request for a single suggestion
• Disclosure: I am the author of this tool