Speed up 'whereis' subcommand

It's downloading ghcup-<ver>.yaml, although it doesn't need it.

added levelgood first issue typeimprovement labels

changed milestone to %0.1.16

added statusWIP label

mentioned in merge request !119 (merged)

mentioned in commit 7846c378

mentioned in commit 56758187

mentioned in commit 3dca5e09

mentioned in commit 84c1963a

mentioned in commit 659fa87f

mentioned in commit 5bc9d579

mentioned in commit f04708e8

closed with merge request !119 (merged)