Update sqlx #475

Job	Run time
build	5m 4s
clippy	2m 4s
fmt	12s
tests (coverage-map)	1m 19s
tests (coverage-point-calculator)	1m 28s
tests (ingest)	1m 51s
tests (reward-scheduler)	56s
tests (task-manager)	1m 29s
tests-postgres (boost-manager)	2m 47s
tests-postgres (file-store)	2m 10s
tests-postgres (iot-config)	2m 58s
tests-postgres (iot-verifier)	2m 42s
tests-postgres (iot-packet-verifier)	3m 58s
tests-postgres (mobile-config)	2m 19s
tests-postgres (mobile-packet-verifier)	2m 33s
tests-postgres (mobile-verifier)	2m 43s
build-release	0s
	36m 33s

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