Updated changelog for 0.16.4
## 0.17.0 (2022-XX-XX)
+## 0.16.4 (2022-08-21)
+
+### Changes
+
- Add ability to connect to PostgreSQL over TLS/SSL [#745](https://github.com/juanfont/headscale/pull/745)
- Fix CLI registration of expired machines [#754](https://github.com/juanfont/headscale/pull/754)
