Restores icon for the mobility module (#15974)

* Restores icon for the mobility module.

* Points to signs.dmi instead

---------

Co-authored-by: Andrew Cooper <mikomyazaki@gmail.com>

code/modules/mob/living/silicon/robot/items/modules/mobility_module.dm

@@ -1,13 +1,13 @@
 /obj/item/borg/combat/mobility
 	name = "mobility module"
 	desc = "By retracting limbs and tucking in its head, a combat android can roll at high speeds."
-	icon = 'icons/obj/decals.dmi'
+	icon = 'icons/obj/signs.dmi'
 	icon_state = "shock"
 
 /obj/item/borg/rescue/mobility
 	name = "mobility module"
 	desc = "The Rescue Module has been outfitted with thrusters capable of retrieving injured Crew at speeds unheard of in other Stationbound modules."
-	icon = 'icons/obj/decals.dmi'
+	icon = 'icons/obj/signs.dmi'
 	icon_state = "shock"
 
 /obj/item/borg/combat/mobility/on_module_activate(mob/living/silicon/robot/R)

html/changelogs/rescue_mobility_icon.yml

@@ -0,0 +1,41 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes:
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#   admin
+#   backend
+#   security
+#   refactor
+#################################
+
+# Your name.
+author: mikomyazaki
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes:
+  - bugfix: "Restores the icon for the rescue cyborg's mobility module."