build(deps): bump com.diffplug.spotless from 8.2.1 to 8.4.0

Bumps com.diffplug.spotless from 8.2.1 to 8.4.0.

---
updated-dependencies:
- dependency-name: com.diffplug.spotless
  dependency-version: 8.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 # Plugins
-spotless = "8.2.1"
+spotless = "8.4.0"
 versions = "0.53.0"
 nexus-publish = "2.0.0"
 release = "3.1.0"