Update sphinx-rtd-theme to 3.0.2 #1829

Job	Run time
Build and test (ubuntu-latest, 3.8)	15s
Build and test (ubuntu-latest, 3.9)	20s
Build and test (ubuntu-latest, 3.10)	14s
Build and test (ubuntu-latest, 3.11)	14s
Build and test (ubuntu-latest, 3.12)	22s
Build and test (ubuntu-latest, 3.13)	1m 13s
Build and test (windows-latest, 3.8)	1m 4s
Build and test (windows-latest, 3.9)	1m 3s
Build and test (windows-latest, 3.10)	1m 29s
Build and test (windows-latest, 3.11)	1m 15s
Build and test (windows-latest, 3.12)	1m 28s
Build and test (windows-latest, 3.13)	1m 39s
Build and test (macos-latest, 3.8)	54s
Build and test (macos-latest, 3.9)	25s
Build and test (macos-latest, 3.10)	25s
Build and test (macos-latest, 3.11)	27s
Build and test (macos-latest, 3.12)	26s
Build and test (macos-latest, 3.13)	30s
	13m 43s

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