Add `MethodFilter::CONNECT` #4877

Job	Run time
check-docs	21s
cargo-hack	3m 46s
check	1m 20s
cargo-public-api-crates (axum)	30s
cargo-public-api-crates (axum-core)	16s
dependencies-are-sorted	18s
cargo-public-api-crates (axum-extra)	35s
cargo-deny check (advisories)	26s
Spell Check with Typos	7s
cargo-public-api-crates (axum-macros)	21s
cargo-deny check (bans licenses sources)	21s
test-nightly	1m 21s
test-versions (stable)	2m 16s
test-versions (beta)	2m 7s
test-docs	1m 16s
armv5te-unknown-linux-musleabi	19s
test-msrv	1m 50s
wasm32-unknown-unknown	17s
	17m 47s

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