Fix polkadot sdk doc. #8969

Job	Run time
preflight / preflight	45s
preflight / ci-versions	54s
cargo-check-benches (master)	20m 51s
test-frame-ui	26m 44s
cargo-check-benches (current)	20m 57s
test-full-crypto-feature	2m 25s
test-node-metrics	8m 0s
cargo-check-each-crate (1)	16m 4s
cargo-check-each-crate (2)	17m 11s
cargo-check-each-crate (3)	6m 27s
cargo-check-each-crate (4)	14m 36s
cargo-check-each-crate (5)	21m 34s
cargo-check-all-crate-macos	11m 40s
cargo-check-each-crate (6)	13m 5s
cargo-check-each-crate (7)	27m 35s
test-frame-examples-compile-to-wasm	2m 51s
test-deterministic-wasm	6m 7s
check-tracing	2m 18s
check-metadata-hash	5m 57s
node-bench-regression-guard	14s
All test misc tests passed	1s
	3h 46m 16s

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