Attempt to address windows CI errors.

test/narrowphase/detail/primitive_shape_algorithm/test_half_space_convex.cpp

@@ -173,7 +173,7 @@ vector<Configuration<S>> GetConfigurations() {
   // plane.
   configurations.emplace_back(
       "simple non-colliding",
-      MakeTransform(AngleAxis<S>::Identity(), Vector3<S>{0, 0, 0.1}), I);
+      MakeTransform(AngleAxis<S>::Identity(), Vector3<S>{0, 0, S(0.1)}), I);
 
   // Simple penetration - the tet is rotated so the point is down and penetrates
   // the plane.
@@ -197,13 +197,13 @@ vector<Configuration<S>> GetConfigurations() {
 
   configurations.emplace_back(
       "non-trivial half space, non-colliding",
-      X_CH * MakeTransform(R_HT_point_down, Vector3<S>{0, 0, 1.01}), X_CH);
+      X_CH * MakeTransform(R_HT_point_down, Vector3<S>{0, 0, S(1.01)}), X_CH);
 
   // We pose the tet relative to the half plane, and the transform it again into
   // the configuration frame. Offset of 0.5 in the z-direction gives us a
   // penetration depth of 0.5.
   const Transform3<S> X_CT =
-      X_CH * MakeTransform(R_HT_point_down, Vector3<S>{0, 0, 0.5});
+      X_CH * MakeTransform(R_HT_point_down, Vector3<S>{0, 0, S(0.5)});
   const Vector3<S> Hz_C = X_CH.linear().col(2);
   // By construction, we're colliding vertex 3 (0, 0, 1). So, let's find where
   // it is in this configuration.