Add link to Digital Detox

_data/links.yml

@@ -10,6 +10,6 @@
 - name: "EFF's Security Education Companion"
   url: "https://sec.eff.org/"
   desc: "A free resource for digital security educators"
-- name: "CopenhagenSec"
-  url: "https://www.meetup.com/CopenhagenSec/"
-  desc: "A meetup group in Copenhagen about (advanced) IT security"
+- name: "Data Detox Kit"
+  url: "https://datadetoxkit.org/en/home/"
+  desc: "Everyday steps you can take to control your digital privacy, security, and wellbeing"