Fixed missed default token

FastRng/Double/Distributions/StudentT.cs

@@ -23,7 +23,7 @@ namespace FastRng.Double.Distributions
             }
         }
         
-        public async ValueTask<double> GetDistributedValue(CancellationToken token)
+        public async ValueTask<double> GetDistributedValue(CancellationToken token = default)
         {
             if (this.Random == null)
                 return System.Double.NaN;