ci(doc): fix stable build of `user-guide` #1979

Job	Run time
build-windows-pr (dev, x86_64-pc-windows-msvc)	2m 27s
build-windows-pr (dev, aarch64-pc-windows-msvc)	2m 25s
build-macos-x86_64 (dev, x86_64-apple-darwin)	2m 34s
build-windows-master	0s
build-windows-pr (dev, x86_64-pc-windows-gnu)	2m 25s
build-linux-pr (dev, x86_64-unknown-linux-gnu)	2m 34s
build-macos-x86_64 (release, x86_64-apple-darwin)	2m 36s
build-windows-pr (release, x86_64-pc-windows-msvc)	2m 28s
build-linux-pr (dev, armv7-unknown-linux-gnueabihf)	2m 33s
build-windows-pr (release, aarch64-pc-windows-msvc)	2m 26s
build-linux-pr (dev, aarch64-linux-android)	2m 34s
build-all-features (ubuntu-latest, x86_64-unknown-linux-gnu)	2m 35s
build-windows-pr (release, x86_64-pc-windows-gnu)	2m 26s
build-freebsd-master	0s
build-linux-pr (dev, aarch64-unknown-linux-gnu)	2m 35s
build-all-features (windows-latest, x86_64-pc-windows-msvc)	2m 18s
build-linux-pr (release, x86_64-unknown-linux-gnu)	2m 32s
build-linux-pr (release, armv7-unknown-linux-gnueabihf)	2m 33s
build-freebsd-stable	0s
build-linux-master	0s
build-linux-stable	0s
build-linux-pr (release, aarch64-linux-android)	2m 32s
build-windows-stable	0s
build-linux-pr (release, aarch64-unknown-linux-gnu)	1m 13s
build-macos-aarch64 (dev, aarch64-apple-darwin)	2m 36s
check	2m 33s
build-macos-aarch64 (release, aarch64-apple-darwin)	2m 35s
doc	4s
conclusion	1s
	51m 35s

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