Update tokio-tungstenite 0.20 (#2116) #3791

Job	Run time
check-docs	40s
check	3m 57s
cargo-hack	8m 51s
cargo-public-api-crates (axum)	1m 53s
cargo-public-api-crates (axum-core)	1m 19s
cargo-public-api-crates (axum-extra)	1m 37s
cargo-public-api-crates (axum-macros)	1m 9s
dependencies-are-sorted	1m 17s
cargo-deny check (advisories)	38s
cargo-deny check (bans licenses sources)	32s
test-nightly	3m 52s
test-versions (stable)	5m 24s
test-versions (beta)	6m 28s
test-docs	5m 30s
armv5te-unknown-linux-musleabi	1m 48s
test-msrv	7m 3s
wasm32-unknown-unknown	40s
	52m 38s

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