[ci skip] Update openHAB versions in README.md

Jenkins build 4926

Author: openhab-bot

README.md

@@ -69,7 +69,7 @@ The openHAB Docker images are available in the [openhab/openhab](https://hub.doc
 
 * **Stable:** Thoroughly tested semi-annual official releases of openHAB. Use the stable version for your production environment if you do not need the latest enhancements and prefer a robust system.
   * `5.0.3` ([Release notes](https://github.com/openhab/openhab-distro/releases/tag/5.0.3))
-  * `4.3.8` ([Release notes](https://github.com/openhab/openhab-distro/releases/tag/4.3.8))
+  * `4.3.9` ([Release notes](https://github.com/openhab/openhab-distro/releases/tag/4.3.9))
 * **Milestone:** Intermediary releases of the next openHAB version which are released about once a month. They include recently added features and bugfixes and are a good compromise between the current stable version and the bleeding-edge and potentially unstable snapshot version.
   * `5.1.0.M3` ([Release notes](https://github.com/openhab/openhab-distro/releases/tag/5.1.0.M3))
   * `5.1.0.M2` ([Release notes](https://github.com/openhab/openhab-distro/releases/tag/5.1.0.M2))