CONTRIBUTING.md in alchemy_cms-5.0.10 vs CONTRIBUTING.md in alchemy_cms-5.1.0.beta1

@@ -37,14 +37,14 @@
 3. Create new branch then make changes and add tests for your changes. Only
 refactoring and documentation changes require no new tests. If you are adding
 functionality or fixing a bug, we need tests!
 
 4. Push to your fork and submit a pull request. If the changes will apply cleanly
-to the latest stable branches and master branch, you will only need to submit one
+to the latest stable branches and main branch, you will only need to submit one
 pull request.
 
 5. If a PR does not apply cleanly to one of its targeted branches, then a separate
-PR should be created that does. For instance, if a PR applied to master & 2.7-stable but not 2.8-stable, then there should be one PR for master & 2.7-stable and another, separate PR for 2.8-stable.
+PR should be created that does. For instance, if a PR applied to main & 2.7-stable but not 2.8-stable, then there should be one PR for main & 2.7-stable and another, separate PR for 2.8-stable.
 
 At this point you're waiting on us. We like to at least comment on, if not
 accept pull requests. We may suggest some changes or improvements or alternatives.
 
 Some things that will increase the chance that your pull request is accepted,