Release process: point to the specific file (dsa-needed.txt) where the RM should look.

wiki/src/contribute/release_process/Debian_security_updates.mdwn

@@ -12,10 +12,14 @@ Security tracker
 ----------------
 
 The Debian [security tracker][web]'s [GIT repository][git] is the main
-place where we can look at the Debian security team upcoming uploads
-and announces. There is also a [mailing list][] that broadcasts
-changes to this repository.
+place where Debian tracks the status of security issues.
+
+We can look at the [list of upcoming Debian Security Advisories (DSA)][DSA needed].
+
+There is also a [mailing list][] that broadcasts changes to
+this repository.
 
 [web]: http://security-tracker.debian.org/tracker/
 [git]: https://salsa.debian.org/security-tracker-team/security-tracker
 [mailing list]: https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/debian-security-tracker-commits
+[DSA needed]: https://salsa.debian.org/security-tracker-team/security-tracker/blob/master/data/dsa-needed.txt