update security.md (#4784)

+ points to axios page instead of bounty calculator
+ improved copy

SECURITY.md

@@ -1,5 +1,6 @@
 # Reporting a Vulnerability
 
-If you discover a security vulnerability within axios, please submit a report via [huntr.dev](https://huntr.dev/bounties/?target=https%3A%2F%2Fgithub.com%2Faxios%2Faxios). Bounties and CVEs are automatically managed and allocated via the platform.
+If you discover a security vulnerability in axios please disclose it via [our huntr page](https://huntr.dev/repos/axios/axios/). Bounty eligibility, CVE assignment, response times and past reports are all there.
 
-All security vulnerabilities will be promptly addressed.
+
+Thank you for improving the security of axios.