Release axum v0.8.0 #5220

Job	Run time
check	1m 57s
cargo-hack	5m 42s
check-docs	26s
cargo-public-api-crates (axum)	52s
cargo-deny check (advisories)	25s
dependencies-are-sorted	18s
cargo-public-api-crates (axum-core)	37s
cargo-deny check (bans licenses sources)	20s
cargo-public-api-crates (axum-extra)	47s
cargo-public-api-crates (axum-macros)	36s
Spell Check with Typos	7s
test-nightly	1m 29s
test-versions (stable)	3m 0s
test-versions (beta)	3m 1s
armv5te-unknown-linux-musleabi	59s
test-msrv	2m 49s
wasm32-unknown-unknown	16s
test-docs	2m 2s
	25m 43s

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