[hassos migration] fix version in readme

README.md

@@ -732,7 +732,7 @@ Readme generated by the [custom readme integration](https://github.com/custom-co
 [home-assistant]: https://home-assistant.io
 
 [ha-version]: https://www.home-assistant.io/blog/categories/release-notes/
-[ha-version-shield]: https://img.shields.io/badge/unknown-555555?style=flat-square&logo=home-assistant
+[ha-version-shield]: https://img.shields.io/badge/2023.10.3-555555?style=flat-square&logo=home-assistant
 
 [github-build-status-shield]: https://img.shields.io/github/actions/workflow/status/zanix/home-assistant-config/home-assistant.yaml?branch=master&style=flat-square&logo=github-actions&logoColor=838B95
 [github-build-status]: https://github.com/zanix/home-assistant-config/actions/workflows/home-assistant.yaml

templates/README.j2

@@ -437,7 +437,7 @@ Readme generated by the [custom readme integration](https://github.com/custom-co
 [home-assistant]: https://home-assistant.io
 
 [ha-version]: https://www.home-assistant.io/blog/categories/release-notes/
-[ha-version-shield]: https://img.shields.io/badge/{{ states('sensor.current_version') }}-555555?style=flat-square&logo=home-assistant
+[ha-version-shield]: https://img.shields.io/badge/{{ states.update.home_assistant_core_update.attributes.installed_version }}-555555?style=flat-square&logo=home-assistant
 
 [github-build-status-shield]: https://img.shields.io/github/actions/workflow/status/zanix/home-assistant-config/home-assistant.yaml?branch=master&style=flat-square&logo=github-actions&logoColor=838B95
 [github-build-status]: https://github.com/zanix/home-assistant-config/actions/workflows/home-assistant.yaml