Update HISTORY.md

Added V2.5 description.

HISTORY.md

@@ -17,3 +17,4 @@
 |   2.2   | Adds a feature to cache the menu configuration and save the time taken for an HTTP request to fetch it. You as the user are responsible for managing the cache by clearing it when you update your configuration. Improvement to widget root display updates. Bug fix for battery level reporting when in the glance carousel. Fixed an uninternationalised string, "Execute". Unfixed issue with battery level updates when the user is not an administrator. |
 |   2.3   | Fix for battery level updates where previously the function only worked for administrator accounts. The new solution is based on Webhooks and is simpler to implement on Home Assistant. Language support fix where an automatic translation produced an inappropriate word, possibly in more than one language. |
 |   2.4   | Sensor status reporting via Home Assistant 'templates'. This provides a generalised way of viewing the status of any entity as long as the result can be rendered as text, e.g. 'uncovered', 'open', '76%', '21 °C'. Removal of the menu style option. The original style was kept after the introduction of the icon style solely to keep the code for a possible re-use for sensor statuses. This version delivers that new feature, hence the style option has been removed. The new JSON configuration file format allows for the old style to be replicated if you are desperate! Added a feature to provide parameters to actions (`tap` or `template`). Added a feature to confirm `toggle` menu items. |
+|   2.5   | A small memory efficiency of about 1kB by removing `RezStrings.mc`. This will aid widgets on old watches that only have 60kB available to an application and are using about 45kB before the menu is fetched, hence 1kB is more significant to those devices. |