Update the list of new physics features (#204)

* add new sections for the released new physics features

Co-authored-by: Amanda <31416491+at669@users.noreply.github.com>

README.md

 - [Unity Industrial Simulation](https://unity.com/products/unity-simulation)
 - [Unity Computer Vision](https://unity.com/computer-vision)
 
-## Coming Soon - New Physics Features in Unity!
+## New Physics Features in Unity
+### New Features
+- **Contact Modification API** This API will allow users to define custom contact reactions, such as ignoring subsets of contact points, in order to help simulate holes, slippery surfaces, soft contacts, and more. It is available in Unity versions **2021.2a12+**. [Read more about the new Contact Modification API](https://forum.unity.com/threads/experimental-contacts-modification-api.924809/).
+- **Collision detection modes exposed for ArticulationBody: discrete, sweep-based CCD, and speculative CCD**. New continuous collision detection (CCD) modes will ensure that fast-moving objects collide with objects, instead of tunneling or passing through those objects, which can happen in the default “discrete” mode. This API is available in Unity versions **2020.3.5f1+**. [Read more about continuous collision detection](https://docs.unity3d.com/2020.3/Documentation/ScriptReference/ArticulationBody-collisionDetectionMode.html).
+
+### Coming Soon
-- **Contact Modification API**. This API will allow users to define custom contact reactions, such as ignoring subsets of contact points, in order to help simulate holes, slippery surfaces, soft contacts, and more. [Read more about the new Contact Modification API](https://forum.unity.com/threads/experimental-contacts-modification-api.924809/).
-- **Collision detection modes exposed for ArticulationBody: discrete, sweep-based ccd, and speculative ccd**. New continuous collision detection (ccd) modes will ensure that fast-moving objects collide with objects, instead of tunneling or passing through those objects, which can happen in the default “discrete” mode. [Read more about continuous collision detection](https://docs.unity3d.com/Manual/ContinuousCollisionDetection.html).
 - **Force/Torque Sensor API**. This API will allow users to get the force and torque acting on an articulation body (useful for simulating a force/torque sensor!), as well as to get the motor torque applied by an articulation drive.
 - **Query primitives**. These simple, GameObject-less shapes allow for collision detection without requiring simulation (i.e., without calling Physics.Simulate). This feature will allow users to initialize objects in feasible locations, and can also be used for motion planning.
 
 investigate the issue as soon as possible.
 
 ## License
-[Apache License 2.0](LICENSE)
+[Apache License 2.0](LICENSE)