Add links to the email archives and subscription page

Author: sjn

README.md

@@ -20,6 +20,8 @@ If you care and would like to make a contribution, you can…
 * Join us in our [IRC channel](ircs://ssl.irc.perl.org:7062/#cpan-security), #cpan-security on irc.perl.org
 * Send an e-mail to the CPAN Security Group <[cpan-security@security.metacpan.org](mailto:cpan-security@security.metacpan.org)> 📧
 * Subscribe to [@cpansec@fosstodon.org](https://fosstodon.org/@cpansec) on the Fediverse :elephant:
+* Subscribe to the [CPANSec mailing lists](https://lists.security.metacpan.org/)
+* Browse and read the [CPANSec CVE Announcements](https://lists.security.metacpan.org/cve-announce/) archive
 
 
 ## Resources

index.md

@@ -32,6 +32,8 @@ If you care and would like to make a contribution, you can…
 * Join us in our [IRC channel](ircs://ssl.irc.perl.org:7062/#cpan-security), #cpan-security on irc.perl.org
 * Send an e-mail to the CPAN Security Group <cpan-security@security.metacpan.org> 📧
 * Subscribe to [@cpansec@fosstodon.org](https://fosstodon.org/@cpansec) on the Fediverse 🐘
+* Subscribe to the [CPANSec mailing lists](https://lists.security.metacpan.org/)
+* Browse and read the [CPANSec CVE Announcements](https://lists.security.metacpan.org/cve-announce/) archive
 
 
 ## Resources