Properly respond with sec-websocket-protocol under http/2 #5237

Job	Run time
check	47s
check-docs	12s
cargo-hack	3m 5s
cargo-public-api-crates (axum)	55s
cargo-deny check (advisories)	25s
cargo-public-api-crates (axum-core)	40s
dependencies-are-sorted	14s
Spell Check with Typos	5s
cargo-deny check (bans licenses sources)	24s
cargo-public-api-crates (axum-extra)	51s
cargo-public-api-crates (axum-macros)	37s
test-msrv	2m 38s
test-docs	1m 24s
armv5te-unknown-linux-musleabi	27s
test-nightly	1m 16s
test-versions (stable)	1m 15s
wasm32-unknown-unknown	16s
test-versions (beta)	1m 15s
	16m 46s

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