Bump thiserror from 1.0.61 to 1.0.68 #1142

Job	Run time
set-image	1s
clippy-examples (STD)	22m 16s
fmt	11m 40s
clippy-examples (WASM)	13m 56s
clippy	23m 14s
check (STD)	16m 46s
check (WASM)	11m 13s
dylint	14m 22s
spellcheck	9m 55s
check (RISCV)	11m 45s
examples-test (1)	10m 2s
examples-custom-test	26m 2s
examples-test (2)	14m 10s
examples-test (3)	9m 18s
examples-test (4)	15m 28s
examples-test (5)	11m 22s
examples-test (6)	9m 9s
test (ink)	20m 43s
build (STD)	18m 46s
test (linting)	13m 41s
build (WASM)	11m 21s
docs	18m 32s
codecov	23m 3s
examples-docs	14m 32s
examples-contract-build (WASM, 1)	17m 22s
examples-contract-build (WASM, 2)	18m 33s
examples-contract-build (WASM, 3)	18m 52s
examples-contract-build (WASM, 4)	16m 35s
examples-contract-build (RISCV, 1)	13m 11s
fuzz	0s
measurements / contract-sizes (master)	31m 29s
measurements / contract-sizes (pull_request)	31m 38s
	8h 18m 57s

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