Add latest firmwares version to versioning (#77)

Author: DCSBL

docs/versioning.mdx

@@ -20,3 +20,16 @@ Do not ask HomeWizard to update your device. Updates are installed automatically
 ## API version
 
 The API is currently fixed to version `v1`. The version is updated when the a new version contains (possible) breaking changes. The version will be unchanged when non breaking changes, such as new features, new endpoints or stability improvements are introduced.
+
+## Latest Versions
+
+| Device                           | Latest stable release | Latest beta release |
+| -------------------------------- | --------------------- | ------------------- |
+| Wi-Fi P1 meter                   | 4.19                  | 5.05                |
+| Wi-Fi Energy Socket (HWE-SKT-11) | 4.08                  | _Up to date_        |
+| Wi-Fi Energy Socket (HWE-SKT-21) | 4.07                  | _Up to date_        |
+| Wi-Fi Watermeter                 | 3.01                  | _Up to date_        |
+| Wi-Fi kWh Meter (1 phase)        | 4.06                  | _Up to date_        |
+| Wi-Fi kWh Meter (3 phase)        | 4.06                  | _Up to date_        |
+
+Beta versions are available for a select group of devices. If you are interested in testing, please request beta access via [this form](https://forms.gle/ViUWaBBjjdQunquK9).