update changelog

Author: Levi Jamt

CHANGELOG.md

@@ -4,7 +4,15 @@ For a more detailed list of all changes, click the header links for each version
 
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
+### [v0.8.2] – 2021-10-22
+
+#### changed
+- FMU-proxy replaced with proxy-fmu which is included in libcosim. No need to manage the proxy processes manually. 
+This is now automatically handled by libcosim ([PR#197](https://github.com/open-simulation-platform/cosim-demo-app/pull/197))
+- Update real time functionality ([PR#186](https://github.com/open-simulation-platform/cosim-demo-app/pull/186))
+
 ### v0.7.0 – 2020-06-08
 First public release.
 
 
+[v0.8.2]: https://github.com/open-simulation-platform/cosim-demo-app/compare/v0.7.0...v0.8.2