Oops, one more fix to the default branch docs

Refs #254

CONTRIBUTING.md

@@ -45,7 +45,7 @@ Only required if dealing with manuals, `gh-pages` or releases:
 4. Run [`shellcheck`][shellcheck] against all your changes with `make lint`
 5. Now, add all your files to the commit with `git add --all` and commit changes with `git commit`, make sure you write a good message, which will explain your work
 6. When running `git commit` the tests will run automatically, your commit will be canceled if they fail
-7. Push to your repository, make a pull-request against `develop` branch. Please, make sure you have **one** commit per pull-request, it will be merge into one anyways
+7. Push to your repository, make a pull-request against `master` branch. Please, make sure you have **one** commit per pull-request, it will be merge into one anyways
 
 ### Branches