Use 'main' instead of 'master' for examples

[JLHasson]

main is now the default branch name: https://github.com/github/renaming#new-repositories-use-main-as-the-default-branch-name

Update the examples in the docs to reflect this

[creyD]

Hi, sorry for the delay in response. You actually make a good point, as the default experience has been changed and this could be confusing for extremely new people. However I also worry about users with existing repos, which would potentially confused by this. Maybe it would be better to replace the examples with placeholder tags like YOUR_BRANCHNAME_HERE or something like that. What do you think?

[JLHasson]

No need to apologize, thanks for taking a look 😄

I think either can work - personally I think I would side with following the convention set by GitHub. In my opinion it's pretty obvious that branches is something you will need to configure if you want the command to run. I'll leave it up to you, if we were to use a template string I would probably suggest using a bash-style variable like

  push:
    branches:
    - ${BRANCH_NAME}

but I guess that could also be confusing since some people may think the variable will get filled by Github Actions which I don't believe is true.