Update README.md

Author: rvhonorato

README.md

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 # Haddock3 user manual
 
+[![build](https://github.com/haddocking/haddock3-user-manual/actions/workflows/build.yml/badge.svg)](https://github.com/haddocking/haddock3-user-manual/actions/workflows/build.yml)
+[![deploy book](https://github.com/haddocking/haddock3-user-manual/actions/workflows/mdbook.yml/badge.svg)](https://github.com/haddocking/haddock3-user-manual/actions/workflows/mdbook.yml)
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 This repository holds the MarkDown files and assets used to compile the Haddock3 user manual !
 
 Thanks to github actions, this book is compiled on pull request and directly published online, accessible at: [https://www.bonvinlab.org/haddock3-user-manual](https://www.bonvinlab.org/haddock3-user-manual)