MAINT: Upgrade the remaining GitHub Actions. <!-- Thank you for contributing to Pyodide! All improvements are welcome,
     so don't be afraid to make a PR. -->

### Description

<!-- Please explain what your PR is about:
     - reasoning for the change
     - some details of updated code
     - any noteworthy choices to be aware of
	Please refer to any related issues by #<issue_id> -->

- https://github.com/actions/checkout/releases
- https://github.com/docker/build-push-action/releases
- https://github.com/docker/login-action/releases
- https://github.com/docker/metadata-action/releases
- https://github.com/pypa/gh-action-pypi-publish/releases
- https://github.com/test-summary/action/releases

Also, add a final check to the CPython upgrade instructions.

### Checklists

<!-- Note:
     If you think some of these steps are not necessary for your PR,
     remove those checkboxes, or mark them as checked. If you keep unchecked checkboxes,
     we will assume that your PR is not ready to be merged  -->

- [ ] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry
- [x] Add / update tests
- [ ] Add new / update outdated documentation

package:
  name: pyodide-http
  version: 0.2.0
  top-level:
    - pyodide_http
source:
  url: https://files.pythonhosted.org/packages/71/54/fcdafe22904c679ba7b9d562f86f43cc71bfb65197f2b51ef6e6698d6296/pyodide_http-0.2.0-py3-none-any.whl
  sha256: 0ab778a95fc09ce59f15e4890202d17ca48dfdbe8ee2e6139e9a8589fc54d61f
about:
  home: https://github.com/koenvo/pyodide-http
  PyPI: https://pypi.org/project/pyodide-http
  summary: Patch requests, urllib and urllib3 to make them work in Pyodide
  license: MIT

package:
  name: pyodide-http
  version: 0.2.0
  top-level:
    - pyodide_http
source:
  url: https://files.pythonhosted.org/packages/71/54/fcdafe22904c679ba7b9d562f86f43cc71bfb65197f2b51ef6e6698d6296/pyodide_http-0.2.0-py3-none-any.whl
  sha256: 0ab778a95fc09ce59f15e4890202d17ca48dfdbe8ee2e6139e9a8589fc54d61f
about:
  home: https://github.com/koenvo/pyodide-http
  PyPI: https://pypi.org/project/pyodide-http
  summary: Patch requests, urllib and urllib3 to make them work in Pyodide
  license: MIT
