Fix BUnits (#906)

Author: bplett-wgtcorp

Common/UnitDefinitions/Frequency.json

@@ -95,8 +95,8 @@
     {
       "SingularName": "BUnit",
       "PluralName": "BUnits",
-      "FromUnitToBaseFunc": "x * x * 1e-3",
-      "FromBaseToUnitFunc": "Math.Sqrt(x * 1e3)",
+      "FromUnitToBaseFunc": "Math.Sqrt(x * 1e3)",
+      "FromBaseToUnitFunc": "x * x * 1e-3",
       "Localization": [
         {
           "Culture": "en-US",

UnitsNet.Tests/CustomCode/FrequencyTests.cs

@@ -28,6 +28,6 @@ public class FrequencyTests : FrequencyTestsBase
 
         protected override double BeatsPerMinuteInOneHertz => 60;
 
-        protected override double BUnitsInOneHertz => 31.622776601683793; // = Math.Sqrt(1000);
+        protected override double BUnitsInOneHertz => 0.001;
     }
 }