Tweak some probabilities. (#6281)

selfmerg, sue me

Content.Server/StationEvents/Events/GasLeak.cs

@@ -36,6 +36,10 @@ namespace Content.Server.StationEvents.Events
 
         public override int MinimumPlayers => 5;
 
+        public override float Weight => WeightLow;
+
+        public override int? MaxOccurrences => 1;
+
         /// <summary>
         ///     Give people time to get their internals on.
         /// </summary>

Content.Server/StationEvents/Events/KudzuGrowth.cs

@@ -24,6 +24,10 @@ public class KudzuGrowth : StationEvent
 
     public override int MinimumPlayers => 15;
 
+    public override float Weight => WeightLow;
+
+    public override int? MaxOccurrences => 2;
+
     // Get players to scatter a bit looking for it.
     protected override float StartAfter => 50f;