rename master branch to main

.github/workflows/build_lint.yml

@@ -3,7 +3,7 @@ name: build
 on:
   push:
     branches:
-    - master
+    - main
     - release**
     paths-ignore:
       - '**.md'

CONTRIBUTING.md

@@ -23,7 +23,7 @@ No contribution is too small. Although, contributions can be too big, so let's d
 - Fork the Mesa-Geo repository.
 - [Clone your repository] from GitHub to your machine.
 - Create a new branch in your fork: `git checkout -b BRANCH_NAME`
-- Run `git config pull.rebase true`. This prevents messy merge commits when updating your branch on top of Mesa-Geo master branch.
+- Run `git config pull.rebase true`. This prevents messy merge commits when updating your branch on top of Mesa-Geo main branch.
 - Install an editable version with developer requirements locally: `pip install -e ".[dev]"`
 - Edit the code. Save.
 - Git add the new files and files with changes: `git add FILE_NAME`
@@ -44,7 +44,7 @@ No contribution is too small. Although, contributions can be too big, so let's d
 Testing and Code Standards
 --------------------------
 
-[![](https://codecov.io/gh/projectmesa/mesa-geo/branch/master/graph/badge.svg)](https://codecov.io/gh/projectmesa/mesa-geo) [![](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![](https://codecov.io/gh/projectmesa/mesa-geo/branch/main/graph/badge.svg)](https://codecov.io/gh/projectmesa/mesa-geo) [![](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 
 As part of our contribution process, we practice continuous integration and use GH Actions to help enforce best practices.
 
@@ -91,7 +91,7 @@ Licensing
 
 The license of this project is located in [LICENSE]. By submitting a contribution to this project, you are agreeing that your contribution will be released under the terms of this license.
 
-[LICENSE]: https://github.com/projectmesa/mesa-geo/blob/master/LICENSE
+[LICENSE]: https://github.com/projectmesa/mesa-geo/blob/main/LICENSE
 
 Special Thanks
 --------------

README.md

@@ -130,4 +130,4 @@ If you run into an issue, please file a [ticket](https://github.com/projectmesa/
 If you would like to add a feature, please reach out via [ticket](https://github.com/projectmesa/mesa-geo/issues) or join a dev session (see [Mesa discussions](https://github.com/projectmesa/mesa/discussions)).
 A feature is most likely to be added if you build it!
 
-Don't forget to check out the [Contributors guide](https://github.com/projectmesa/mesa-geo/blob/master/CONTRIBUTING.md).
+Don't forget to check out the [Contributors guide](https://github.com/projectmesa/mesa-geo/blob/main/CONTRIBUTING.md).