Bump subxt-metadata from 0.38.0 to 0.38.1 #1480

Job	Run time
set-image	1s
clippy	11m 29s
clippy-examples (STD)	12m 20s
clippy-examples (RISCV)	8m 57s
dylint	8m 26s
examples-test-mapping	11m 46s
fmt	7m 39s
spellcheck	2m 15s
check (STD)	8m 11s
check (RISCV)	5m 3s
build (STD)	9m 18s
test (ink)	7m 53s
build (RISCV)	5m 5s
test (linting)	7m 44s
examples-test	0s
codecov	0s
docs	0s
examples-custom-test	0s
examples-docs	9m 18s
examples-contract-build (RISCV, 1)	9m 20s
examples-contract-build (RISCV, 2)	9m 2s
examples-contract-build (RISCV, 3)	9m 35s
examples-contract-build (RISCV, 4)	8m 46s
fuzz	0s
measurements	0s
	2h 32m 8s

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