Fixing a bug with default ParticleFile outputdt value #397

Job	Run time
py3.13 \| macos \| integration tests	14m 0s
py3.13 \| macos \| unit tests	9m 2s
mypy	3m 43s
py3.13 \| ubuntu \| integration tests	17m 25s
py3.13 \| ubuntu \| unit tests	13m 7s
py3.13 \| windows \| integration tests	29m 10s
py3.13 \| windows \| unit tests	21m 37s
py3.10 \| ubuntu \| unit tests	12m 36s
py3.10 \| ubuntu \| integration tests	17m 9s
py3.11 \| ubuntu \| unit tests	12m 44s
py3.12 \| ubuntu \| unit tests	13m 22s
merge-test-artifacts	3s
	2h 43m 58s

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