correct activation joints for ulnar placement

Author: davidkline-ms

Assets/MRTK/SDK/Features/Utilities/Solvers/HandConstraintPalmUp.cs

@@ -367,11 +367,14 @@ private bool TryGenerateActivationPoint(IMixedRealityHand jointedHand, out Vecto
                     referenceJoint2 = TrackedHandJoint.Palm;
                     break;
                 case SolverSafeZone.RadialSide:
-                case SolverSafeZone.UlnarSide:
-                default:
                     referenceJoint1 = TrackedHandJoint.IndexKnuckle;
                     referenceJoint2 = TrackedHandJoint.ThumbProximalJoint;
                     break;
+                case SolverSafeZone.UlnarSide:
+                default:
+                    referenceJoint1 = TrackedHandJoint.PinkyKnuckle;
+                    referenceJoint2 = TrackedHandJoint.Wrist;
+                    break;
             }