fix: run pytest hook on unstaged files

[jenstroeger]

Note that all make check variants run their pre-commit hooks on unstaged files by using the --all-files command line option:

python-package-template/Makefile

Lines 157 to 166 in f41b0e6

	check-bandit:
	pre-commit run bandit --all-files
	check-flake8:
	pre-commit run flake8 --all-files
	check-lint:
	pre-commit run pylint --all-files
	check-mypy:
	pre-commit run mypy --all-files
	check:
	pre-commit run --all-files

However, running make test does not specify that option

python-package-template/Makefile

Lines 170 to 171 in f41b0e6

	test:
	pre-commit run pytest --hook-stage push

and thus stashes changes before running:

> make test
pre-commit run pytest --hook-stage push
[WARNING] Unstaged files detected.
[INFO] Stashing unstaged files to /path/to/.cache/pre-commit/patch1666240262-62070.
Run unit tests...........................................................Passed
- hook id: pytest
- duration: 0.9s

...
============================== 1 passed in 0.35s ===============================

[INFO] Restored changes from /path/to/.cache/pre-commit/patch1666240262-62070.

This change uses the --files command line option (which is similar to the --all-files) and now make test no longer stashes changes before running.