axum: update changelog with the last released version #5268

Job	Run time
cargo-hack	2m 57s
check	2m 19s
check-docs	24s
cargo-public-api-crates (axum)	55s
cargo-public-api-crates (axum-core)	36s
cargo-deny check (advisories)	25s
dependencies-are-sorted	33s
cargo-public-api-crates (axum-extra)	51s
cargo-deny check (bans licenses sources)	25s
Spell Check with Typos	6s
cargo-public-api-crates (axum-macros)	39s
test-msrv	2m 41s
test-versions (stable)	1m 15s
armv5te-unknown-linux-musleabi	26s
test-docs	1m 35s
test-versions (beta)	4m 1s
test-nightly	1m 11s
wasm32-unknown-unknown	23s
	21m 42s

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