📃 docs(readme): add bedrock disclaimer

Author: jjourdan-externe

README.md

@@ -1,5 +1,12 @@
 # Actions Sync
 
+## Disclaimer (for Bedrock)
+
+- This is kind of a "fork" of [this project](https://github.com/kema-dev/actions-sync), which is a fork of [this project](https://github.com/actions/actions-sync)
+- Its only purpose is to not rely on a remote repository for [this project](https://github.m6web.fr/devops/sync-public-actions)
+- Updating this "fork" can be done by adding upstream remote first, using `git remote add upstream https://github.com/kema-dev/actions-sync`
+- Then you can update this project by pulling upstream remote, using `git pull upstream main`
+
 <p align="center">
   <img src="docs/arrow.png">
 </p>