modify link to CoFest page on the menu, suggestion from @nlharris

Author: hmenager

hugo.yaml

@@ -112,10 +112,10 @@ menu:
       weight: 6
       parent: 'bosc'
       url: 'events/bosc-2025/panel/'
-    - name: "CollaborationFest (2025)"
+    - name: "CollaborationFest"
       weight: 7
       parent: 'bosc'
-      url: 'events/bosc-2025/ismb-collaborationfest-2025/'
+      url: '/events/bosc/collaborationfest/'
     - name: 'Sponsors'
       weight: 8
       parent: 'bosc'