Docs: [AEA-0000] - update example workflow (#4)

## Summary

- Routine Change

### Details

- update example workflow

Author: anthony-nhs

README.md

@@ -31,6 +31,8 @@ on:
   schedule:
     - cron: '*/30 * * * *'
 
+permissions: {}
+
 jobs:
   auto-approve-dependabot:
     runs-on: ubuntu-22.04
@@ -61,4 +63,3 @@ Contributions to this project are welcome from anyone, providing that they confo
 This code is dual licensed under the MIT license and the OGL (Open Government License). Any new work added to this repository must conform to the conditions of these licenses. In particular this means that this project may not depend on GPL-licensed or AGPL-licensed libraries, as these would violate the terms of those libraries' licenses.
 
 The contents of this repository are protected by Crown Copyright (C).
-