Sell plasma canister at cargo (#22357)

This was removed a while ago to prevent griefing. Since then we've
obtained gas canister locks and are also trying to limit the amount of
frezon that can be produced, so bring it back.

Resources/Prototypes/Catalog/Cargo/cargo_atmospherics.yml

@@ -90,17 +90,17 @@
 #  category: Atmospherics
 #  group: market
 
-#- type: cargoProduct
-#  name: "plasma canister"
-#  id: AtmosphericsPlasma
-#  description: "Plasma canister"
-#  icon:
-#    sprite: Structures/Storage/canister.rsi
-#    state: orange
-#  product: PlasmaCanister
-#  cost: 8500
-#  category: Atmospherics
-#  group: market
+- type: cargoProduct
+  name: "plasma canister"
+  id: AtmosphericsPlasma
+  description: "Plasma canister"
+  icon:
+    sprite: Structures/Storage/canister.rsi
+    state: orange
+  product: PlasmaCanister
+  cost: 8500
+  category: Atmospherics
+  group: market
 
 #- type: cargoProduct
 #  name: "tritium canister"