Cargo.lock: bump `signature` to v2.2.0 #1472

Job	Run time
test (1.65.0)	3m 55s
no_std (thumbv7em-none-eabi, 1.65.0)	5m 44s
test (stable)	27s
no_std (thumbv7em-none-eabi, stable)	2m 1s
no_std (wasm32-unknown-unknown, 1.65.0)	5m 32s
no_std (wasm32-unknown-unknown, stable)	2m 2s
	19m 41s

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