Add L4T 32.3.1/OpenCV 4.1.1 to readme

Author: JetsonHacksNano

README.md

@@ -80,8 +80,7 @@ flip-method         : video flip methods
 
 <h2>OpenCV and Python</h2>
 Starting with L4T 32.2.1 / JetPack 4.2.2, GStreamer support is built in to OpenCV.
-The OpenCV version is 3.3.1 for those versions. Please note that if you are using
-earlier versions of OpenCV (most likely installed from the Ubuntu repository), you
+Please note that if you are using earlier versions of OpenCV (most likely installed from the Ubuntu repository), you
 will get 'Unable to open camera' errors.
 <br>
 If you can open the camera in GStreamer from the command line, and have issues opening the camera in Python, check the OpenCV version. 
@@ -92,6 +91,11 @@ If you can open the camera in GStreamer from the command line, and have issues o
 
 <h2>Release Notes</h2>
 
+v3.0 Release December, 2019
+* L4T 32.3.1 (JetPack 4.3)
+* OpenCV 4.1.1
+* Tested on Jetson Nano
+
 v2.0 Release September, 2019
 * L4T 32.2.1 (JetPack 4.2.2)
 * OpenCV 3.3.1