Fix doc build error #1013

Job	Run time
docs	1m 34s
Rust unit tests (ubuntu-latest)	2m 34s
Rustfmt	8s
Rust unit tests (macos-latest)	1m 41s
lint	1m 34s
Rust unit tests (windows-latest)	4m 30s
test (macos-latest, 3.9)	4m 40s
typecheck	1m 15s
test (macos-latest, 3.10)	4m 29s
test (macos-latest, 3.11)	3m 54s
test (macos-latest, 3.12)	4m 54s
test (macos-latest, 3.13)	4m 29s
test (ubuntu-latest, 3.9)	5m 53s
test (ubuntu-latest, 3.10)	6m 0s
test (ubuntu-latest, 3.11)	6m 24s
test (ubuntu-latest, 3.12)	8m 46s
test (ubuntu-latest, 3.13)	9m 12s
test (windows-latest, 3.9)	7m 32s
test (windows-latest, 3.10)	8m 24s
test (windows-latest, 3.11)	10m 13s
test (windows-latest, 3.12)	10m 5s
test (windows-latest, 3.13)	9m 57s
	1h 58m 8s

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