chore(deps): bump com.diffplug.spotless from 8.7.0 to 8.9.0 (#198)

Bumps com.diffplug.spotless from 8.7.0 to 8.9.0.

---
updated-dependencies:
- dependency-name: com.diffplug.spotless
  dependency-version: 8.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alex <1452182+ardetrick@users.noreply.github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ hydraClient = "26.2.0"
 javaJwt = "4.6.0"
 playwright = "1.61.0"
 springBoot = "4.1.0"
-spotless = "8.7.0"
+spotless = "8.9.0"
 springDependencyManagement = "1.1.7"
 # Default pin. CI overrides this via -PtestcontainersOryHydraVersion (see settings.gradle.kts);
 # do not inline this version back into build.gradle.kts.