make zscaler private access documentation page public (DataDog#22712)

Author: iliakur

zscaler_private_access/manifest.json

@@ -3,7 +3,7 @@
   "app_uuid": "316cf13a-3c12-4014-9cb1-e3fa6ad8dd5e",
   "app_id": "zscaler-private-access",
   "owner": "agent-integrations",
-  "display_on_public_website": false,
+  "display_on_public_website": true,
   "tile": {
     "overview": "README.md#Overview",
     "configuration": "README.md#Setup",
@@ -102,4 +102,4 @@
     "homepage": "https://www.datadoghq.com",
     "sales_email": "info@datadoghq.com"
   }
-}
+}