tramstation virology is no longer depowered by a singular guaranteed rat roundstart (#79643)

## About The Pull Request

i put catwalk flooring over the cable

## Why It's Good For The Game

fixes #79472

## Changelog
🆑
fix: The plaguebearer can no longer depower virology on Tramstation
/🆑

Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

_maps/map_files/tramstation/tramstation.dmm

@@ -6478,7 +6478,7 @@
 /obj/machinery/power/apc/auto_name/directional/north,
 /obj/structure/cable,
 /obj/effect/decal/cleanable/dirt,
-/turf/open/floor/plating,
+/turf/open/floor/catwalk_floor,
 /area/station/medical/virology)
 "bfa" = (
 /obj/effect/turf_decal/trimline/red/filled/line,
@@ -9244,7 +9244,7 @@
 /obj/effect/mapping_helpers/airlock/access/all/medical/virology,
 /obj/structure/cable,
 /obj/effect/decal/cleanable/dirt,
-/turf/open/floor/plating,
+/turf/open/floor/catwalk_floor,
 /area/station/medical/virology)
 "cdr" = (
 /obj/effect/turf_decal/trimline/red/filled/line{