Adding Official OpenCV Courses link to README.md

README.md

@@ -3,10 +3,12 @@
 ### Resources
 
 * Homepage: <https://opencv.org>
+  * Courses: <https://opencv.org/courses>
 * Docs: <https://docs.opencv.org/master/>
 * Q&A forum: <http://answers.opencv.org>
 * Issue tracking: <https://github.com/opencv/opencv/issues>
 
+
 ### Contributing
 
 Please read the [contribution guidelines](https://github.com/opencv/opencv/wiki/How_to_contribute) before starting work on a pull request.