tiny colossus fixes (#2175)

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## About The Pull Request

Fixes a couple of oversights from the colossus update. Adds bedsheets to
the beds in dorms and replaces the autolathe in the armory with a
security techfab. Also removes a single compact pickaxe.

## Why It's Good For The Game

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## Changelog

:cl:
tweak: removed a single pickaxe from the Colossus
fix: added missing bedsheets and techfab to the Colossus
/:cl:

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_maps/shuttles/shiptest/inteq_colossus.dmm

@@ -3552,6 +3552,7 @@
 /obj/effect/decal/cleanable/dirt/dust,
 /obj/structure/bed,
 /obj/structure/curtain/bounty,
+/obj/item/bedsheet/brown,
 /turf/open/floor/carpet/black,
 /area/ship/crew)
 "Ou" = (
@@ -4030,11 +4031,11 @@
 /turf/open/floor/plasteel/patterned/grid,
 /area/ship/hallway/central)
 "Tz" = (
-/obj/machinery/autolathe,
 /obj/effect/turf_decal/corner/opaque/brown{
 	dir = 8
 	},
 /obj/effect/turf_decal/corner/opaque/yellow,
+/obj/machinery/rnd/production/techfab/department/security,
 /turf/open/floor/plasteel/dark,
 /area/ship/security)
 "TF" = (
@@ -4287,6 +4288,7 @@
 	pixel_y = -32
 	},
 /obj/structure/curtain/bounty,
+/obj/item/bedsheet/brown,
 /turf/open/floor/carpet/black,
 /area/ship/crew)
 "Xb" = (