chore: remove huntr + encourage GitHub vulnerability reporting (#23754)

SECURITY.md

@@ -2,7 +2,7 @@
 
 ## Reporting a Vulnerability
 
-To report a vulnerability, please send an email to **security@nuxtjs.org** or submit it for a bounty via [Huntr](https://huntr.dev/bounties/disclose/?target=https://github.com/nuxt/nuxt).
+To report a vulnerability, please [privately report it via the Security tab](https://github.com/nuxt/nuxt/security/advisories/new) on the correct GitHub repository (see [documentation](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability#privately-reporting-a-security-vulnerability)). If that is impossible, feel free to send an email to **security@nuxtjs.org** instead.
 
 All security vulnerabilities will be promptly verified and addressed.