<!-- Please make sure you have read the submission guidelines before
posting an PR -->
<!--
https://github.com/nrwl/nx/blob/master/CONTRIBUTING.md#-submitting-a-pr
-->
<!-- Please make sure that your commit message follows our format -->
<!-- Example: `fix(nx): must begin with lowercase` -->
<!-- If this is a particularly complex change or feature addition, you
can request a dedicated Nx release for this pull request branch. Mention
someone from the Nx team or the `@nrwl/nx-pipelines-reviewers` and they
will confirm if the PR warrants its own release for testing purposes,
and generate it for you if appropriate. -->
## Current Behavior
<!-- This is the behavior we have today -->
## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
1. remove unnecessary references to `runs-on`
2. fix ordering of rule precedence example so that it matches the
explanatory paragraph
3. modify the matrix github actions example so that agents of different
types do not have the same name
## Related Issue(s)
<!-- Please link the issue being fixed so it gets closed when this is
merged. -->
Fixes #
4cca2ba062