Update README.md

Author: jeanpierrefortune

README.md

@@ -17,8 +17,8 @@ This repository uses two main branches:
 To add documentation for a new library:
 
 ```bash
-# Switch to `doc` branch
-git checkout doc
+# Switch to `gh-pages` branch
+git checkout gh-pages
 
 # Add the submodule pointing to the doc branch
 git submodule add -b doc https://github.com/calypsonet/[library-name].git [library-name]
@@ -64,4 +64,4 @@ Please read our [contribution guidelines](https://terminal-api.calypsonet.org/co
 
 ## License
 
-This project is licensed under the Eclipse Public License v. 2.0. See [LICENSE](LICENSE) for details.
+This project is licensed under the Eclipse Public License v. 2.0. See [LICENSE](LICENSE) for details.