DOC: switch to author-year citation style #484

Job	Run time
pytest / Determine job matrix	4s
style / Determine skipped pre-commit hooks	6s
doc / nb / Execute and build documentation	2m 36s
doc / linkcheck / Check external links	51s
pytest / Run unit tests (3.10, ubuntu-22.04)	1m 38s
pytest / Run unit tests (3.11, ubuntu-22.04)	1m 29s
pytest / Run unit tests (3.12, ubuntu-22.04)	1m 51s
pytest / Run unit tests (3.7, ubuntu-22.04)	2m 26s
pytest / Run unit tests (3.8, ubuntu-22.04)	1m 41s
pytest / Run unit tests (3.9, ubuntu-22.04, ampform)	4m 25s
pytest / Run unit tests (3.9, macos-12)	2m 23s
style / Run local pre-commit hooks	1m 26s
style / Run taplo through pre-commit	19s
style / Push changes	0s
doc / Upload to GitHub Pages	0s
	21m 15s

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