Update pyiron_atomistics optional dependency #57

Job	Run time
pyiron / commit-updated-env	7s
pyiron / build-docs	46s
pyiron / build-notebooks	5m 39s
pyiron / black	9s
pyiron / benchmark-tests	1m 59s
pyiron / pip-check	48s
pyiron / unit-tests (ubuntu-latest, 3.11)	3m 55s
pyiron / unit-tests (ubuntu-latest, 3.10)	4m 3s
pyiron / unit-tests (ubuntu-latest, 3.9)	3m 58s
pyiron / unit-tests (windows-latest, 3.11)	16m 51s
pyiron / unit-tests (macos-latest, 3.11)	7m 30s
pyiron / coveralls-and-codacy / Tests-and-Coverage	2m 33s
	48m 18s

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