Merge pull request 'Enables 40C3 event card and links to Hamburg Hackertours' (#7) from feat/enable-40c3 into main

Reviewed-on: #7

content/de/_index.md

@@ -14,8 +14,7 @@ events:
     event: 40. Chaos Communication Congress
     date: 27.–30. Dezember 2026
     location: Hamburg Messe
-    url: https://events.ccc.de/congress/2026/
-    status: In Vorbereitung
+    url: https://hackertours.hamburg.ccc.de/de/40c3/
   - code: EH23
     title: The Bunny is a Lie
     event: Easterhegg 2026

content/en/_index.md

@@ -14,8 +14,7 @@ events:
     event: 40th Chaos Communication Congress
     date: 27–30 December 2026
     location: Hamburg Messe
-    url: https://events.ccc.de/congress/2026/
-    status: In preparation
+    url: https://hackertours.hamburg.ccc.de/de/40c3/
   - code: EH23
     title: The Bunny is a Lie
     event: Easterhegg 2026