Update aiida-workgraph to 0.8.1 #416

Job	Run time
arithmetic	1m 37s
documentation	44s
pip_check	54s
nfdi4ing	3m 51s
coverage	1m 13s
quantumespresso	1m 46s
unittest_matrix (ubuntu-latest, 3.12)	1m 3s
black	12s
unittest_matrix (ubuntu-latest, 3.11)	1m 0s
unittest_matrix (macos-latest, 3.12)	1s
	12m 21s

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