chore: add missing symbol #4749

Job	Run time
cargo-hack	3m 15s
check-docs	17s
cargo-public-api-crates (axum)	32s
check	40s
cargo-public-api-crates (axum-core)	23s
dependencies-are-sorted	13s
cargo-public-api-crates (axum-extra)	33s
cargo-deny check (advisories)	24s
cargo-public-api-crates (axum-macros)	14s
cargo-deny check (bans licenses sources)	24s
Spell Check with Typos	5s
armv5te-unknown-linux-musleabi	28s
test-docs	1m 32s
test-nightly	1m 13s
test-msrv	2m 25s
wasm32-unknown-unknown	15s
test-versions (stable)	1m 25s
test-versions (beta)	1m 17s
	15m 35s

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