fix(deps): update dependency com.diffplug.spotless:spotless-plugin-gradle to v8

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ buildconfig = "5.3.5"
 commons-io = "2.15.1"
 dependencyAnalysis = "1.29.0"
 detekt = "1.23.5"
-diffplug-spotless = "6.25.0"
+diffplug-spotless = "8.8.0"
 dokka = "1.9.10"
 dokkatoo = "2.1.0"
 dropbox-dependencyGuard = "0.5.0"