updated compatibility matrix in README #191

	name: Kubernetes Python Client - Validation

	on: [ push, pull_request ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.8", "3.10", "3.11"]
	include:
	- python-version: "3.9"
	use_coverage: 'coverage'

	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: Lint with flake8
	run: \|
	pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Install Tox and any other packages
	run: pip install tox

	- name: Test without coverage
	if: "! matrix.use_coverage"
	run: tox -e py # Run tox using the version of Python in `PATH`

	- name: Test with coverage
	if: "matrix.use_coverage"
	run: tox -e py-coverage

	- name: Upload coverage to Codecov
	if: "matrix.use_coverage"
	uses: codecov/codecov-action@v4
	with:
	fail_ci_if_error: false
	verbose: true

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