.readthedocs.yml: explicit Sphinx configuration #3108

Job	Run time
mypy	47s
check-docs	39s
pathogen-repo-ci (dengue)	2m 56s
pathogen-repo-ci-v0 (avian-flu)	53s
pathogen-repo-ci (lassa)	7m 10s
pyright	24s
pathogen-repo-ci-v0 (ebola)	57s
pathogen-repo-ci (measles)	1m 32s
pathogen-repo-ci-v0 (mumps)	54s
pathogen-repo-ci (mpox)	1m 18s
test (python=3.9 biopython=1.80)	13m 43s
pathogen-repo-ci-v0 (ncov)	1m 1s
pathogen-repo-ci (seasonal-cov)	1m 53s
test (python=3.9 biopython=1.82)	13m 41s
pathogen-repo-ci-v0 (rsv)	8m 43s
pathogen-repo-ci (zika)	1m 5s
test (python=3.9 biopython=latest)	13m 18s
pathogen-repo-ci-v0 (seasonal-flu)	1m 10s
test (python=3.10 biopython=1.80)	13m 6s
pathogen-repo-ci-v0 (tb)	1m 15s
test (python=3.10 biopython=1.82)	12m 49s
test (python=3.10 biopython=latest)	12m 50s
test (python=3.11 biopython=1.80)	12m 41s
test (python=3.11 biopython=1.82)	12m 49s
test (python=3.11 biopython=latest)	12m 46s
test (python=3.12 biopython=1.82)	19m 38s
test (python=3.12 biopython=latest)	19m 33s
build-docs / build	2m 16s
codecov	15s
release	0s
rebuild-docker-image	0s
	3h 12m 2s

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