Bump thiserror from 1.0.68 to 1.0.69 #1157

Job	Run time
set-image	1s
check (STD)	16m 38s
clippy	23m 36s
clippy-examples (STD)	22m 31s
check (WASM)	11m 16s
clippy-examples (WASM)	13m 34s
check (RISCV)	11m 31s
dylint	14m 38s
fmt	11m 34s
spellcheck	10m 0s
test (ink)	19m 25s
build (STD)	19m 6s
test (linting)	14m 2s
build (WASM)	11m 6s
codecov	23m 27s
docs	18m 0s
examples-custom-test	25m 37s
examples-test (1)	9m 18s
examples-test (2)	14m 14s
examples-test (3)	8m 55s
examples-test (4)	14m 22s
examples-test (5)	11m 21s
examples-test (6)	9m 41s
examples-docs	15m 8s
examples-contract-build (WASM, 1)	18m 47s
examples-contract-build (WASM, 2)	18m 58s
examples-contract-build (WASM, 3)	19m 54s
examples-contract-build (WASM, 4)	16m 39s
examples-contract-build (RISCV, 1)	14m 9s
fuzz	0s
measurements / contract-sizes (master)	31m 36s
measurements / contract-sizes (pull_request)	31m 4s
	8h 20m 8s

Provide feedback