Fix sequence order in serialization function #364

Job	Run time
formatting	10s
mavlink-dump	1m 2s
linting	1m 47s
internal-tests (ardupilotmega)	1m 4s
msrv	6m 0s
internal-tests (asluav)	1m 19s
internal-tests (matrixpilot)	1s
internal-tests (minimal)	1m 6s
internal-tests (paparazzi)	1m 20s
internal-tests (python_array_test)	1s
internal-tests (slugs)	1s
internal-tests (standard)	1m 7s
internal-tests (test)	1s
internal-tests (ualberta)	1s
internal-tests (uavionix)	1m 6s
internal-tests (icarous)	1m 4s
internal-tests (common)	1m 6s
docs	0s
build	0s
test-embedded-size	0s
	18m 16s

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