Update tokio-tungstenite 0.20 #3780

Job	Run time
check	2m 18s
cargo-public-api-crates (axum)	53s
cargo-public-api-crates (axum-core)	35s
cargo-public-api-crates (axum-extra)	57s
cargo-public-api-crates (axum-macros)	27s
check-docs	35s
dependencies-are-sorted	29s
cargo-hack	4m 46s
cargo-deny check (advisories)	1m 44s
cargo-deny check (bans licenses sources)	1m 43s
test-nightly	3m 37s
test-docs	3m 40s
armv5te-unknown-linux-musleabi	1m 15s
wasm32-unknown-unknown	40s
test-msrv	2m 24s
test-versions (stable)	3m 12s
test-versions (beta)	3m 17s
	32m 32s

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