Bump wat from 1.221.2 to 1.222.0 #1306

Job	Run time
set-image	1s
clippy	14m 38s
spellcheck	3m 27s
check (STD)	11m 43s
clippy-examples (STD)	18m 0s
dylint	5m 18s
check (WASM)	5m 21s
clippy-examples (WASM)	9m 47s
check (RISCV)	4m 10s
fmt	3m 57s
test (ink)	11m 13s
build (STD)	14m 41s
build (WASM)	5m 46s
test (linting)	6m 6s
examples-custom-test	0s
examples-test	0s
codecov	0s
docs	0s
examples-docs	10m 48s
examples-contract-build (WASM, 1)	14m 5s
examples-contract-build (WASM, 2)	14m 1s
examples-contract-build (WASM, 3)	14m 51s
examples-contract-build (WASM, 4)	16m 2s
examples-contract-build (RISCV, 1)	4m 17s
fuzz	0s
measurements	0s
	3h 8m 12s

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