Release axum 0.8.4 and related crates #5773

Job	Run time
check	2m 16s
check-docs	44s
cargo-hack	3m 6s
cargo-deny check (advisories)	28s
cargo-deny check (bans licenses sources)	25s
cargo-public-api-crates (axum-macros)	39s
dependencies-are-sorted	34s
cargo-public-api-crates (axum)	55s
cargo-public-api-crates (axum-extra)	48s
cargo-public-api-crates (axum-core)	36s
Spell Check with Typos	5s
test-nightly	32s
test-msrv	2m 41s
test-versions (stable)	3m 7s
test-versions (beta)	3m 51s
armv5te-unknown-linux-musleabi	1m 4s
test-docs	1m 36s
wasm32-unknown-unknown	25s
	23m 52s

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