add method_not_allowed_fallback to router #4935

Job	Run time
check-docs	27s
check	2m 13s
cargo-hack	5m 12s
cargo-public-api-crates (axum)	35s
cargo-public-api-crates (axum-core)	17s
cargo-deny check (advisories)	23s
dependencies-are-sorted	20s
cargo-public-api-crates (axum-extra)	33s
Spell Check with Typos	5s
cargo-deny check (bans licenses sources)	24s
cargo-public-api-crates (axum-macros)	17s
test-nightly	1m 41s
test-msrv	2m 35s
armv5te-unknown-linux-musleabi	43s
test-docs	1m 54s
test-versions (stable)	3m 6s
wasm32-unknown-unknown	19s
test-versions (beta)	3m 16s
	24m 20s

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