Bump matplotlib from 3.8.4 to 3.9.0 #30

Job	Run time
pyiron / commit-updated-env	9s
pyiron / test-alternate-env	0s
pyiron / benchmark-tests	3m 6s
pyiron / build-notebooks	4m 20s
pyiron / build-docs	4m 21s
pyiron / pip-check	2m 22s
pyiron / unit-tests (ubuntu-latest, 3.11)	2m 51s
pyiron / unit-tests (ubuntu-latest, 3.10)	3m 29s
pyiron / black	9s
pyiron / unit-tests (windows-latest, 3.11)	12m 42s
pyiron / unit-tests (macos-latest, 3.11)	5m 49s
pyiron / coveralls-and-codacy / Tests-and-Coverage	2m 55s
	42m 13s

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