docs: fix Dash docset build #1756

Job	Run time
Build wheels on Linux (aarch64/manylinux)	16m 13s
Build wheels on Linux (x86_64)	24m 3s
Build wheels on Linux (i686)	18m 49s
Build wheels on Linux (aarch64/musllinux)	9m 26s
Build wheels on macOS (x86_64)	16m 57s
Build wheels on macOS (arm64)	9m 9s
Build wheels on Windows (x64)	27m 37s
Build wheels for WebAssembly	5m 57s
Build wheels on Windows (Win32)	12m 41s
Build with sanitizers for debugging purposes	2m 6s
Build sdist and test extra dependencies	2m 16s
	2h 25m 14s

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