Update dependency gradle to v6.9.4

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
gradle (source)	patch	6.9.3 -> 6.9.4

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Release Notes

gradle/gradle

### [`v6.9.4`](https://togithub.com/gradle/gradle/releases/tag/v6.9.4): 6.9.4 This is a patch release for 6.9. We recommend using 6.9.4 instead of 6.9. It fixes the following issues: - [#​23680](https://togithub.com/gradle/gradle/issues/23680) Dependency graph resolution: Equivalent excludes can cause un-necessary graph mutations \[backport 6.x] - [#​23945](https://togithub.com/gradle/gradle/issues/23945) Backport trusting only full GPG keys in dependency verification \[Backport 6.9.4] - [#​23950](https://togithub.com/gradle/gradle/issues/23950) Exclude rule merging: missing optimization \[backport 6.x] [Read the Release Notes](https://docs.gradle.org/6.9.4/release-notes.html) #### Upgrade Instructions Switch your build to use Gradle 6.9.4 by updating your wrapper: ./gradlew wrapper --gradle-version=6.9.4 See the [Gradle 6.x upgrade guide](https://docs.gradle.org/6.9.4/userguide/upgrading_version\_6.html#changes\_6.9) to learn about deprecations, breaking changes and other considerations when upgrading to Gradle 6.9.4. #### Reporting Problems If you find a problem with this release, please file a bug on [GitHub Issues](https://togithub.com/gradle/gradle/issues) adhering to our issue guidelines. If you're not sure you're encountering a bug, please use the [forum](https://discuss.gradle.org/c/help-discuss).

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Configuration

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