Add `MethodFilter::CONNECT` #4890

Job	Run time
cargo-hack	2m 54s
check	40s
cargo-public-api-crates (axum)	35s
check-docs	13s
cargo-public-api-crates (axum-core)	22s
cargo-deny check (advisories)	24s
cargo-public-api-crates (axum-extra)	30s
dependencies-are-sorted	15s
cargo-deny check (bans licenses sources)	23s
cargo-public-api-crates (axum-macros)	16s
Spell Check with Typos	6s
test-docs	1m 13s
test-nightly	1m 12s
armv5te-unknown-linux-musleabi	23s
test-msrv	1m 49s
test-versions (stable)	1m 30s
wasm32-unknown-unknown	15s
test-versions (beta)	1m 23s
	14m 23s

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