build(deps): bump ha-mqtt-discoverable

Bumps [ha-mqtt-discoverable](https://github.com/unixorn/ha-mqtt-discoverable) from 0.16.0 to 0.16.3.
- [Release notes](https://github.com/unixorn/ha-mqtt-discoverable/releases)
- [Changelog](https://github.com/unixorn/ha-mqtt-discoverable/blob/main/Changelog.md)
- [Commits](unixorn/ha-mqtt-discoverable@v0.16.0...v0.16.3)

---
updated-dependencies:
- dependency-name: ha-mqtt-discoverable
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

GridboxConnectorAddon-edge/GridboxConnector/requirements.txt

@@ -1,3 +1,3 @@
-ha-mqtt-discoverable==0.16.0
+ha-mqtt-discoverable==0.16.3
 requests==2.32.3
 viessmann-gridbox-connector==1.6.0