* clarify language
I guess this action doesn't technically make sure that my working directory is `$GITHUB_WORKSPACE`, so this might be more precise?
* fix repetition
This action checks out your repository to $GITHUB_WORKSPACE, so that your workflow can access the contents of your repository.
By default, this is equivalent to running git fetch and git checkout $GITHUB_SHA, so that you'll always have your repo contents at the version that triggered the workflow.
See here to learn what $GITHUB_SHA is for different kinds of events.