Buff emergency toolbox fill (space-wizards#24225)

Resolves issue space-wizards#23059, for which the submitter wrote:

Emergency toolboxes contain a crowbar, two flashlights (sometimes one), two breath masks, and two chocolate. With the addition of water bottles to survival boxes and emergency nitrogen tanks, I think emergency toolboxes should be updated to include said water bottles and emergency tanks. Would make these just a little bit more useful. It feels weird they don't have oxygen tanks when they have two breath masks, and since water bottles are now commonplace it would be a good idea to put them in a place where emergency food is stored as well.

Resources/Prototypes/Catalog/Fills/Items/toolboxes.yml

@@ -8,16 +8,25 @@
     contents:
       - id: CrowbarRed
       - id: ClothingMaskBreath
-        amount: 2
-      - id: FoodSnackChocolate
+      - id: ClothingMaskBreath
+        prob: 0.5
+      - id: EmergencyOxygenTankFilled
+      - id: EmergencyOxygenTankFilled
+        prob: 0.5
+      - id: EmergencyNitrogenTankFilled
+      - id: EmergencyNitrogenTankFilled
+        prob: 0.5
+      - id: FoodTinMRE
+      - id: FoodTinMRE
+        prob: 0.5
+      - id: DrinkWaterBottleFull
+      - id: DrinkWaterBottleFull
+        prob: 0.5
       - id: FlashlightLantern
       - id: FlashlightLantern
         prob: 0.5
       - id: HarmonicaInstrument
         prob: 0.15
-        orGroup: HarmonicaOrChocolate
-      - id: FoodSnackChocolate
-        orGroup: HarmonicaOrChocolate
 
 - type: entity
   id: ToolboxElectricalFilled