Replace async_track_state_change with async_track_state_change_event

[mikeage]

Throws warnings in 2024.5+

See https://developers.home-assistant.io/blog/2024/04/13/deprecate_async_track_state_change/

Note that the component still doesn't work properly under 2024.5; see #326 .

Description

Checklist

• [x] The PR title is clear, concise and follows conventional commit formatting.
• [x] Double-check your branch is based on develop and targets develop
• [ ] Issue raised to compliment this PR (if no pre-existing issue exists)
• [x] Code is commented, particularly in hard-to-understand areas and relevant issues are referenced.
• [x] Documentation repository updated to reflect new features or changes in behaviour (VERY IMPORTANT, undocumented features cannot be discovered and used!)
• [x] Description explains the issue/use-case resolved and auto-closes related issues.
• [x] Breaking changes or changes in behaviour are called out and discussed in separate issues.
• [x] Testing of new changes completed by person who raised the issue.

Please open an issue before embarking on any significant pull request, especially those that add a new library or change existing tests, otherwise you risk spending a lot of time working on something that might not end up being merged into the project.

License

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Related Issues

Closes

[robchandhok]

This patch works for me.

[elupus]

Looks good to me. The threading fixes in that other issue are needed to get it up and running again.