Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -9,7 +9,7 @@ Pull Request for new features, bugs or translations are often appreciated. Howev
 - __Make your commit message as descriptive as possible.__ Include as much information as you can. Explain anything that the file diffs themselves won’t make apparent.
 - __Document your pull request__. Explain your fix, link to the relevant issue. A pull request without any comment will get closed.
 - __Consolidate multiple commits into a single commit when you rebase.__ If you’ve got several commits in your local repository that all have to do with a single change, you can squash multiple commits into a single, clean, descriptive commit when using git-rebase. When you do, good karma is yours.
-- __Make sure the target of your pull request is the relevant dev branch__. Most of bugfix or new feature should go to the `dev` branch.
+- __Make sure the target of your pull request is the relevant dev branch__. Most of bugfix or new feature should go to the `master` branch.
 - __Include only commits fixing a specific issue__. If your pull request has unrelated commit, it will get closed.
 
 ### UI changes