add method_not_allowed_fallback to router #4727

Job	Run time
cargo-hack	6m 11s
check-docs	48s
cargo-public-api-crates (axum)	34s
check	1m 0s
cargo-public-api-crates (axum-core)	23s
cargo-deny check (advisories)	27s
cargo-public-api-crates (axum-extra)	28s
dependencies-are-sorted	42s
cargo-deny check (bans licenses sources)	26s
cargo-public-api-crates (axum-macros)	17s
Spell Check with Typos	0s
test-versions	0s
test-msrv	0s
armv5te-unknown-linux-musleabi	0s
test-nightly	0s
test-docs	0s
wasm32-unknown-unknown	0s
	11m 16s

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