Update `gradle` to `v8.9` (was `8.8`)

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
gradle (source)	minor	8.8 -> 8.9

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Release Notes

gradle/gradle (gradle)

### [`v8.9`](https://togithub.com/gradle/gradle/compare/v8.8.0...v8.9.0) [Compare Source](https://togithub.com/gradle/gradle/compare/v8.8.0...v8.9.0)

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Configuration

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