build(deps): bump spotless from 7.0.0.BETA3 to 7.0.4

Bumps `spotless` from 7.0.0.BETA3 to 7.0.4.

Updates `com.diffplug.spotless:spotless-plugin-gradle` from 7.0.0.BETA3 to 7.0.4
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@gradle/7.0.0.BETA3...gradle/7.0.4)

Updates `com.diffplug.spotless` from 7.0.0.BETA3 to 7.0.4

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
  dependency-version: 7.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.diffplug.spotless
  dependency-version: 7.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -70,7 +70,7 @@ rxandroid = "2.0.2"
 rxjava = "2.1.14"
 serialization = "1.5.1"
 slf4jNop = "2.0.9"
-spotless = "7.0.0.BETA3"
+spotless = "7.0.4"
 testServices = "1.2.0"
 truth = "1.4.4"
 truthProtoExtension = "1.0"