version: bump version to v0.5.1-rc3 #3807

Job	Run time
cross compilation	12m 0s
Format check	25s
Compilation check	1m 38s
Docker build check	3m 39s
run itests	11m 57s
run itests postgres	20m 7s
Lint check	2m 48s
migration version check	9s
go mod check	21s
RPC check	1m 12s
run LiT tests	15m 52s
sample configuration check	40s
Sqlc check	28s
test vector check	1m 9s
run unit tests (unit-race)	14m 30s
run unit tests (unit-cover)	4m 43s
run unit tests (unit dbbackend=postgres)	6m 4s
finish	3s
	1h 37m 45s

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