Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,12 +1,11 @@
 # How to Contribute to this Repository
 
-Before contributing to this specific repository, please read the [Contribution Guidelines](https://nrkno.github.io/sofie-core/docs/for-developers/contribution-guidelines) for the Sofie project.
+Before contributing to this specific repository, please read the [Contribution Guidelines](https://nrkno.github.io/sofie-core/docs/for-developers/contribution-guidelines) for the _Sofie_ project.
 
 
 ## Branches
 This repository uses the following branches:
 
 * **_master_** is our main branch. We consider it stable and it is used in production.
-* The **_releaseXX_** branches are our in-development branches. When a release is ready, we decide to “freeze” that branch and create a new **_releaseXX+1_** branch.
 
-We encourage you to base your contributions on the latest **releaseXX** branch, alternatively the **master** branch or a recently frozen **releaseXX** branch. The [Sofie Releases](https://nrkno.github.io/sofie-core/releases) page collects the status and timeline of the releases.
+We encourage you to base your contributions on the latest **master** branch of this repository. The [_Sofie Releases_](https://nrkno.github.io/sofie-core/releases) page collects the status and timeline of the _Sofie_ releases.