Update changelog to show release 0.6.2
@@ -15,9 +15,12 @@ Changelog](http://keepachangelog.com/en/1.0.0/).
> - **Fixed**: for any bug fixes.
> - **Security**: in case of vulnerabilities.
-[UNRELEASED](https://github.com/Qiskit/qiskit-aqua/compare/0.6.1...HEAD)
+[UNRELEASED](https://github.com/Qiskit/qiskit-aqua/compare/0.6.2...HEAD)
========================================================================
+[0.6.2](https://github.com/Qiskit/qiskit-aqua/compare/0.6.1...0.6.2) - 2019-12-17
+=================================================================================
+
Changed
-----
