add slug override

Author: Thomas Gilbert

src/_data/catalog/slugs.yml

@@ -208,4 +208,6 @@ destinations:
   - original: "fullstory-cloud-mode-actions"
     override: "actions-fullstory-cloud"
   - original: "klayvio-actions"
-    override: "actions-klayvio"
+    override: "actions-klayvio"
+  - original: "app-fit"
+    override: "actions-app-fit"