Fix(operator): Missing custom plugin step (#3756)

* Update operator-dataplane-custom-plugins.md

* Update operator-dataplane-custom-plugins.md

* Update operator-dataplane-custom-plugins.md

* Update operator-dataplane-custom-plugins.md

Author: lmilan

app/_how-tos/operator-dataplane-custom-plugins.md

@@ -31,6 +31,9 @@ prereqs:
     routes:
       - echo
   operator:
+    konnect:
+      auth: true
+      control_plane: true
     controllers:
       - kongplugininstallation
 
@@ -79,6 +82,36 @@ docker push $YOUR_REGISTRY_ADDRESS/myheader:1.0.0
 
 In this example, the plugin is available in the public registry (Docker Hub) as `kong/plugin-example:1.0.0`. The following steps use the same source.
 
+{: data-deployment-topology="konnect" }
+## Register the plugin schema in Konnect
+
+To see your custom plugin in {{site.konnect_product_name}}, you need to register the schema with your control plane.
+
+First, get your control plane ID:
+
+<!--vale off-->
+{% konnect_api_request %}
+url: /v2/control-planes?filter%5Bname%5D%5Beq%5D=gateway-control-plane
+status_code: 200
+method: GET
+extract_body:
+  - name: data[0].id
+    variable: CONTROL_PLANE_ID
+capture: CONTROL_PLANE_ID
+jq: ".data[0].id"
+{% endkonnect_api_request %}
+<!--vale on-->
+
+Run the following command to upload your schema file to your {{site.konnect_short_name}} control plane:
+
+```sh
+curl -X POST \
+  https://us.api.konghq.com/v2/control-planes/$CONTROL_PLANE_ID/core-entities/plugin-schemas \
+  --header 'Content-Type: application/json' \
+  --header "Authorization: Bearer $KONNECT_TOKEN" \
+  --data "{\"lua_schema\": $(jq -Rs . './myheader/schema.lua')}"
+```
+
 ## Install the plugin
 
 1. Install the plugin using the `KongPluginInstallation` resource. This resource makes the plugin available for instances of {{site.base_gateway}} resources: