fix lint from beta #189

Job	Run time
coverage	1m 48s
test-python	1m 47s
check-version	15s
test (opening-hours-syntax, stable)	25s
test (opening-hours-syntax, beta)	22s
test (opening-hours-syntax, nightly)	20s
test (., stable)	2m 22s
test (., beta)	2m 30s
test (., nightly)	1m 34s
test (compact-calendar, stable)	20s
test (compact-calendar, beta)	18s
test (compact-calendar, nightly)	17s
build-python-windows (x64)	3m 16s
build-python-emscripten	5m 0s
build-python-macos (x86_64)	6s
build-python-windows (x86)	4m 48s
build-python-macos (aarch64)	7s
build-python-linux (x86_64)	1m 20s
build-python-sdist	28s
build-python-linux (x86)	1m 20s
build-python-linux (aarch64)	1m 20s
deploy-rust (compact-calendar)	12s
build-python-linux (armv7)	1m 20s
deploy-rust (opening-hours-syntax)	10s
build-python-linux (s390x)	1m 20s
deploy-rust (.)	12s
build-python-linux (ppc64le)	1m 15s
deploy-python	0s
deploy-python-doc	0s
	34m 32s

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