Fix typo in extractors guide (#3554) #5864

Job	Run time
cargo-public-api-crates (axum-extra)	31s
check	2m 12s
dependencies-are-sorted	32s
cargo-public-api-crates (axum-core)	18s
Spell Check with Typos	9s
cargo-deny check (bans licenses sources)	31s
check-docs	57s
cargo-hack	3m 0s
cargo-public-api-crates (axum)	34s
cargo-public-api-crates (axum-macros)	19s
cargo-deny check (advisories)	27s
test-versions (stable)	3m 12s
test-docs	1m 22s
wasm32-unknown-unknown	30s
armv5te-unknown-linux-musleabi	1m 7s
test-msrv	2m 23s
test-nightly	24s
test-versions (beta)	3m 21s
	21m 49s

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