update reference to master branch to main

Tested to confirm that it does create a `main` branch by default

Author: dan-hill2802

docs/resources/project.md

@@ -77,7 +77,7 @@ consult the [gitlab documentation](https://docs.gitlab.com/ee/user/project/repos
 
 * `archived` - (Optional) Whether the project is in read-only mode (archived). Repositories can be archived/unarchived by toggling this parameter.
 
-* `initialize_with_readme` - (Optional) Create master branch with first commit containing a README.md file.
+* `initialize_with_readme` - (Optional) Create main branch with first commit containing a README.md file.
 
 * `packages_enabled` - (Optional) Enable packages repository for the project.