Apply ruff/flake8-pyi rule PYI063

[DimitriPapadopoulos]

PYI063 Use PEP 570 syntax for positional-only parameters

This change is not compatible with Python 3.7. Do you still require compatibility with Python 3.7 now that pip has moved to Python 3.9?

truststore/.github/workflows/ci.yml

Lines 76 to 86 in 4b5b8ac

	# Run 'python -m compileall' on an old Python version
	# to ensure that pip can vendor truststore successfully.
	runs-on: ubuntu-22.04 # pin to 22.04, as with 24.04 Python 3.7 is no longer available
	name: compileall
	steps:
	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
	- uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5
	with:
	python-version: "3.7"
	- run: |
	python -m compileall -qq -f src/truststore/