polkadot-sdk-docs: Use command_macro! #7226

Job	Run time
preflight / preflight	42s
preflight / ci-versions	1m 2s
test-full-crypto-feature	2m 40s
cargo-check-benches (master)	20m 57s
cargo-check-benches (current)	20m 53s
cargo-check-each-crate (1)	18m 44s
cargo-check-each-crate (2)	19m 39s
test-frame-ui	46m 39s
cargo-check-each-crate (3)	8m 28s
cargo-check-each-crate (4)	17m 14s
cargo-check-each-crate (5)	24m 44s
test-node-metrics	8m 17s
cargo-check-each-crate (6)	15m 17s
cargo-check-each-crate (7)	27m 28s
cargo-check-all-crate-macos	12m 27s
test-frame-examples-compile-to-wasm	3m 10s
test-deterministic-wasm	6m 34s
check-tracing	2m 24s
check-metadata-hash	6m 12s
node-bench-regression-guard	11s
All test misc tests passed	1s
	4h 23m 43s

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