chore(deps): bump scale-typegen v0.8.0 #4736

Job	Run time
Check unused dependencies	42s
Cargo fmt	33s
Cargo check	10m 51s
Cargo clippy (WASM)	1m 31s
Cargo clippy	7m 14s
Check documentation and run doc tests	8m 12s
Cargo check (WASM)	2m 7s
Test (no_std)	2m 8s
Test (Light Client)	5m 33s
Test (WASM)	6m 24s
Test (Native)	11m 9s
Test (Unstable Backend)	10m 59s
	1h 7m 23s

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