Bump action-docs from 2.0.0 to 2.1.0 #218

Job	Run time
test (ubuntu-latest, nightly)	5m 56s
test (ubuntu-latest, lts)	6m 3s
test-generate	2s
test (ubuntu-latest, lts-22.7, 9.6.4)	5m 48s
test (ubuntu-latest, lts-12.26, 8.4.4)	4m 53s
test (macOS-latest, nightly)	2m 0s
test (macOS-latest, lts)	3m 26s
test (macOS-latest, lts-22.7, 9.6.4)	1m 18s
test (macOS-latest, lts-12.26, 8.4.4)	3m 22s
test (windows-latest, nightly)	5m 19s
test (windows-latest, lts)	7m 15s
test (windows-latest, lts-22.7, 9.6.4)	8m 9s
test (windows-latest, lts-12.26, 8.4.4)	6m 30s
test-stack-yamls (stack-nightly.yaml)	5m 50s
test-stack-yamls (stack.yaml)	5m 11s
	1h 11m 2s

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