Buff spacer by reducing it's cost (#88055)

## About The Pull Request

Reduced cost of "Spacer" quirk by 2 points
## Why It's Good For The Game

Spacer is a quirk with many downsides built in, but it's cost is on par
with strong perks that have no negatives.

20% less damage from space and faster movement is debatably worth built
in depression while on Icebox or playing Shaft Miner, but it's cost
makes using it really restrictive for the flavor and gameplay benefits
it offers
## Changelog
🆑
tweak: Reduce Spacers cost from 7 to 5
/🆑

code/datums/quirks/positive_quirks/spacer.dm

@@ -9,7 +9,7 @@
 	gain_text = span_notice("You feel at home in space.")
 	lose_text = span_danger("You feel homesick.")
 	icon = FA_ICON_USER_ASTRONAUT
-	value = 7
+	value = 5
 	quirk_flags = QUIRK_HUMAN_ONLY|QUIRK_CHANGES_APPEARANCE
 	medical_record_text = "Patient is well-adapted to non-terrestrial environments."
 	mail_goodies = list(