Try to fix `mypy` typing error #1900

Job	Run time
test-integration-citation-cff	36s
test-integration-ormolu	17s
test-integration-bumpver	8s
build-vehicle-python / vehicle-python / Linux - x86_64	17m 3s
build-vehicle-python / vehicle-python / Linux - x86_64	17m 50s
build-vehicle / vehicle / Linux - GHC 9.4.8	12m 6s
build-vehicle-python / vehicle-python / macOS - x86_64	44m 12s
build-vehicle-python / vehicle-python / Windows - AMD64	19m 22s
build-vehicle / vehicle / macOS - GHC 9.4.8	11m 46s
build-vehicle / vehicle / Windows - GHC 9.4.8	12m 51s
build-vehicle / vehicle / Linux - GHC 9.8.1	14m 6s
build-vehicle / vehicle / Linux - GHC 9.6.4	11m 44s
build-vehicle / vehicle / Linux - GHC 9.2.8	12m 7s
build-vehicle / vehicle / Linux - GHC 9.0.2	12m 41s
build-vehicle / vehicle / Linux - GHC 8.10.7	12m 16s
build-vehicle / vehicle / Linux - GHC 9.4.8 -fnothunks	12m 2s
Publish package to GitHub Releases	0s
Publish package to PyPI	0s
	3h 31m 7s

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