Properly respond with sec-websocket-protocol under http/2 #5224

Job	Run time
check	41s
check-docs	17s
cargo-public-api-crates (axum)	53s
cargo-hack	2m 52s
cargo-public-api-crates (axum-core)	37s
cargo-deny check (advisories)	24s
dependencies-are-sorted	14s
cargo-public-api-crates (axum-extra)	48s
cargo-deny check (bans licenses sources)	24s
Spell Check with Typos	5s
cargo-public-api-crates (axum-macros)	37s
test-nightly	1m 15s
test-docs	1m 23s
armv5te-unknown-linux-musleabi	45s
test-msrv	2m 37s
test-versions (stable)	1m 19s
wasm32-unknown-unknown	17s
test-versions (beta)	1m 19s
	16m 47s

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