Enable htmlzip and epub on readthedocs #2564

Job	Run time
Test Examples	58s
check_release	2m 7s
integration_check (ubuntu-latest, 3.8)	2m 16s
Check Links	5m 47s
integration_check (ubuntu-latest, 3.9)	2m 26s
build (ubuntu-latest, 3.8)	5m 43s
integration_check_pypy	2m 4s
integration_check (ubuntu-latest, 3.10)	2m 19s
build (ubuntu-latest, 3.11)	5m 14s
Make SDist	39s
integration_check (ubuntu-latest, 3.11)	2m 14s
build (windows-latest, 3.8)	15m 3s
build (windows-latest, 3.11)	15m 52s
Test Docs	1m 9s
Test Lint	54s
build (macos-latest, 3.8)	8m 31s
Test Minimum Versions	5m 28s
build (macos-latest, 3.11)	8m 36s
Test Prereleases	3m 49s
build (windows-latest, 3.9)	12m 59s
build (ubuntu-latest, pypy-3.8)	9m 18s
build (macos-latest, 3.10)	6m 12s
build (ubuntu-latest, 3.12)	6m 4s
Install from SDist and Test	3m 56s
coverage	16s
tests_check	4s
	2h 9m 58s

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