Release axum v0.8.0 #5151

Job	Run time
cargo-hack	5m 5s
cargo-public-api-crates (axum)	28s
check	1m 34s
cargo-public-api-crates (axum-core)	14s
check-docs	21s
cargo-public-api-crates (axum-extra)	26s
cargo-deny check (advisories)	23s
dependencies-are-sorted	14s
Spell Check with Typos	4s
cargo-deny check (bans licenses sources)	23s
cargo-public-api-crates (axum-macros)	17s
armv5te-unknown-linux-musleabi	40s
test-docs	1m 31s
test-msrv	1m 57s
test-nightly	1m 27s
test-versions (stable)	2m 42s
wasm32-unknown-unknown	11s
test-versions (beta)	2m 39s
	20m 36s

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