Avoid clone in fallback #4904

Job	Run time
cargo-hack	5m 9s
check-docs	35s
cargo-public-api-crates (axum)	30s
check	1m 35s
cargo-public-api-crates (axum-core)	19s
cargo-public-api-crates (axum-extra)	27s
cargo-deny check (advisories)	24s
cargo-public-api-crates (axum-macros)	16s
dependencies-are-sorted	13s
cargo-deny check (bans licenses sources)	23s
Spell Check with Typos	4s
test-nightly	1m 38s
armv5te-unknown-linux-musleabi	47s
test-docs	1m 50s
test-msrv	2m 39s
test-versions (stable)	2m 55s
wasm32-unknown-unknown	13s
test-versions (beta)	2m 38s
	22m 35s

Provide feedback