[RHDEVDOCS-6456] Pipelines-as-Code: Remove Plan permissions for GitHub App

Author: ochromy

modules/op-pac-configuring-github-app-manually.adoc

@@ -48,10 +48,9 @@ $ openssl rand -hex 20
 * **Metadata**: `Read-only`
 * **Pull request**: `Read & Write`
 
-. Select the following items in the **Organization permissions** section:
+. Select the following item in the **Organization permissions** section:
 
 * **Members**: `Read-only`
-* **Plan**: `Read-only`
 
 . Subscribe to the following events: