Turn on public docs for vectra (DataDog#23907)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: albertlinde

vectra/manifest.json

@@ -3,7 +3,7 @@
   "app_uuid": "ea75e670-67d1-4953-a6b8-63665fc27582",
   "app_id": "vectra",
   "owner": "saas-integrations",
-  "display_on_public_website": false,
+  "display_on_public_website": true,
   "tile": {
     "overview": "README.md#Overview",
     "configuration": "README.md#Setup",