add note about permissions for the checks REST endpoints (#48910)

content/rest/checks/runs.md

@@ -12,6 +12,10 @@ allowTitleToDifferFromFilename: true
 autogenerated: rest
 ---
 
+{% note %}
 
+**Note**: {% data reusables.apps.checks-availability %}
+
+{% endnote %}
 
 <!-- Content after this section is automatically generated -->

content/rest/checks/suites.md

@@ -12,6 +12,12 @@ allowTitleToDifferFromFilename: true
 autogenerated: rest
 ---
 
+{% note %}
+
+**Note**: {% data reusables.apps.checks-availability %}
+
+{% endnote %}
+
 {% note %}
 
   **Note:** A GitHub App usually only receives one [`check_suite`](/webhooks-and-events/webhooks/webhook-events-and-payloads#check_suite) event per commit SHA, even if you push the commit SHA to more than one branch. To find out when a commit SHA is pushed to a branch, you can subscribe to branch [`create`](/webhooks-and-events/webhooks/webhook-events-and-payloads#create) events.