GitHub: update vendored release script #15010

Job	Run time
RPC and mobile compilation check	5m 46s
cross compilation	14m 14s
check commits	4m 39s
check pinned dependencies (google.golang.org/grpc v1.59.0)	5s
lint code	6m 50s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	6s
sample configuration check	3m 52s
Sqlc check	3m 18s
run unit tests (btcd unit-cover)	16m 57s
run macOS itest	0s
run unit tests (unit tags="kvdb_etcd")	18m 31s
run ubuntu itests	0s
run unit tests (unit tags="kvdb_postgres")	18m 42s
run windows itest	0s
run unit tests (unit tags="kvdb_sqlite")	16m 23s
run unit tests (btcd unit-race)	35m 17s
check release notes updated	0s
run unit tests (unit-module)	3m 25s
finish	6s
	2h 28m 11s

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