Add links to segv learninglab repos

Author: s0

courses/cpp/ctf-segv/README.md

@@ -1,6 +1,13 @@
 # GitHub Security Lab CTF 1: SEGV hunt
 
+This folder contains the GitHub actions and docker images for this course.
+
+For the Learning lab course repositories, see:
+
+* [`githubtraining/codeql-ctf-segv`](https://github.com/githubtraining/codeql-ctf-segv)
+* [`githubtraining/codeql-ctf-segv-template`](https://github.com/githubtraining/codeql-ctf-segv-template)
+
 This Learning Lab course is still in development,
 in the meantime,
 you can take this course by reading the original instructions:
-https://securitylab.github.com/ctf/segv
+https://securitylab.github.com/ctf/segv