docs: some README touchup

README.md

@@ -31,7 +31,7 @@ What does it do?
 <sup>² Only supported on Travis</sup><br>
 <sup>³ Beta support until Travis CI fixes <a href="https://travis-ci.community/t/no-space-left-on-device-for-system-z/5954/11">a bug</a></sup><br>
 
-- Builds manylinux, macOS, and Windows wheels for CPython and PyPy
+- Builds manylinux, macOS 10.9+, and Windows wheels for CPython and PyPy
 - Works on GitHub Actions, Azure Pipelines, Travis CI, AppVeyor, CircleCI, and GitLab CI
 - Bundles shared library dependencies on Linux and macOS through [auditwheel](https://github.com/pypa/auditwheel) and [delocate](https://github.com/matthew-brett/delocate)
 - Runs the library test suite against the wheel-installed version of your library
@@ -77,8 +77,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      # Used to host cibuildwheel
       - uses: actions/setup-python@v2
-        name: Install Python
 
       - name: Install cibuildwheel
         run: python -m pip install cibuildwheel==1.8.0
@@ -93,7 +93,7 @@ jobs:
           path: ./wheelhouse/*.whl
 ```
 
-For more information, including building on Python 2, PyPI deployment, and the use of other CI services, check out the [documentation](https://cibuildwheel.readthedocs.org) and the [examples](https://github.com/joerick/cibuildwheel/tree/master/examples).
+For more information, including building on Python 2, PyPI deployment, and the use of other CI services or the dedicated GitHub Action, check out the [documentation](https://cibuildwheel.readthedocs.org) and the [examples](https://github.com/joerick/cibuildwheel/tree/master/examples).
 
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