scripts/keys: add roasbeef's new key #3525

Job	Run time
cross compilation	11m 45s
Compilation check	1m 35s
Format check	21s
Docker build check	3m 35s
run itests	11m 34s
run itests postgres	19m 55s
Lint check	2m 30s
migration version check	13s
go mod check	22s
RPC check	1m 9s
run LiT tests	12m 46s
sample configuration check	34s
Sqlc check	2m 44s
test vector check	53s
run unit tests (unit-race)	11m 36s
run unit tests (unit-cover)	4m 23s
run unit tests (unit dbbackend=postgres)	6m 13s
finish	4s
	1h 32m 12s

Provide feedback