Update README.md

Signed-off-by: Seyed Ali Ghasemi <info@gha3mi.com>

README.md

@@ -13,6 +13,7 @@ ForCAD supports **B-Spline**, **NURBS**, **Bezier**, and **Rational Bezier** cur
 
 ## Main Features
 
+- Parallelized using `OpenMP` and `do concurrent`.
 - Create NURBS objects by specifying control points, weights and knots.
 - Refine NURBS objects by inserting or removing knots and elevating degree.
 - Compute basis functions and derivatives of NURBS objects.