Add missing serde attribute for deserialization. #4238

Job	Run time
Code Style	57s
Get minimum supported rust version	18s
SDK docs - mgmt	24m 16s
test AutoRust	2m 32s
SDK docs	1m 20s
SDK docs - svc	3m 16s
Services Tests (stable, false)	15m 52s
SDK Tests (stable, false)	3m 22s
Emulator Tests (stable, false)	3m 31s
Services Tests (1.70.0, false)	16m 59s
SDK Tests (1.70.0, false)	5m 58s
E2E Tests (stable, false)	1m 10s
Emulator Tests (1.70.0, false)	5m 47s
SDK Tests (nightly, true)	4m 47s
E2E Tests (1.70.0, false)	1m 13s
Emulator Tests (nightly, true)	4m 28s
E2E Tests (nightly, true)	50s
Services Tests (nightly, true)	16m 41s
WASM Tests (stable, false)	41s
WASM Tests (1.70.0, false)	1m 23s
WASM Tests (nightly, true)	59s
	1h 56m 20s

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