Update dependency com.diffplug.spotless:spotless-plugin-gradle to v8

Author: renovate[bot]

buildSrc/build.gradle.kts

@@ -14,7 +14,7 @@ object PluginVersions {
     const val gradle_plugin = "8.13.0"
     const val kotlin_gradle_plugin = "2.2.20"
     const val ben_manes = "0.53.0"
-    const val spotless = "7.2.1"
+    const val spotless = "8.0.0"
     const val detekt = "1.23.8"
     const val ktlint = "13.1.0"
     const val dokka = "2.0.0"