meta: increase security policy response targets (#40968)

Author: mcollina

SECURITY.md

@@ -4,8 +4,8 @@
 
 Report security bugs in Node.js via [HackerOne](https://hackerone.com/nodejs).
 
-Your report will be acknowledged within 24 hours, and you’ll receive a more
-detailed response to your report within 48 hours indicating the next steps in
+Your report will be acknowledged within 5 days, and you’ll receive a more
+detailed response to your report within 10 days indicating the next steps in
 handling your submission.
 
 After the initial reply to your report, the security team will endeavor to keep