Properly respond with sec-websocket-protocol under http/2 (#3141) #5300

Job	Run time
cargo-hack	6m 41s
check	38s
cargo-public-api-crates (axum)	1m 0s
check-docs	55s
cargo-public-api-crates (axum-core)	49s
cargo-public-api-crates (axum-extra)	56s
cargo-deny check (advisories)	25s
dependencies-are-sorted	12s
cargo-public-api-crates (axum-macros)	46s
cargo-deny check (bans licenses sources)	25s
Spell Check with Typos	4s
test-nightly	1m 2s
test-msrv	2m 55s
armv5te-unknown-linux-musleabi	1m 15s
test-docs	2m 28s
test-versions (stable)	4m 19s
wasm32-unknown-unknown	30s
test-versions (beta)	1m 22s
	26m 42s

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