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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -84,7 +84,7 @@ pluginz-dokka = { module = "org.jetbrains.dokka:dokka-gradle-plugin", version.re
 pluginz-kotlin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
 pluginz-kotlinSerialization = { module = "org.jetbrains.kotlin:kotlin-serialization", version.ref = "kotlin" }
 pluginz-shadow = { module = "com.gradleup.shadow:shadow-gradle-plugin", version = "8.3.10" }
-pluginz-spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version = "7.2.1" }
+pluginz-spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version = "8.4.0" }
 pluginz-buildConfig = { module = "com.github.gmazzo:gradle-buildconfig-plugin", version = "3.1.0" }
 protobuf-gradlePlugin = { module = "com.google.protobuf:protobuf-gradle-plugin", version.ref = "protobufGradlePlugin" }
 protobuf-java = { module = "com.google.protobuf:protobuf-java", version.ref = "protobuf" }