nanotrasen to gato

Replaced most instances of Nanotrasen mentions into GATO, though I've kept some that have more sense to be kept as Nanotrasen (like nanotrasen marked stuff and such)

code/datums/ert.dm

@@ -13,7 +13,7 @@
 
 /datum/ert/New()
 	if (!polldesc)
-		polldesc = "a Code [code] Nanotrasen Emergency Response Team"
+		polldesc = "a Code [code] GATO Emergency Response Team"
 
 /datum/ert/blue
 	opendoors = FALSE
@@ -35,7 +35,7 @@
 	rename_team = "Deathsquad"
 	code = "Delta"
 	mission = "Leave no witnesses."
-	polldesc = "an elite Nanotrasen Strike Team"
+	polldesc = "an elite GATO Strike Team"
 
 /datum/ert/centcom_official
 	code = "Green"
@@ -54,7 +54,7 @@
 	leader_role = /datum/antagonist/ert/commander/inquisitor
 	rename_team = "Inquisition"
 	mission = "Destroy any traces of paranormal activity aboard the station."
-	polldesc = "a Nanotrasen paranormal response team"
+	polldesc = "a GATO paranormal response team"
 
 /datum/ert/greybois
 	code = "Green"