Update spotless to v8.4.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -33,7 +33,7 @@ material-icons = "1.7.8"
 lottie = "6.7.1"
 core-ktx = "1.18.0"
 core-splashscreen = "1.2.0"
-spotless = "8.1.0"
+spotless = "8.4.0"
 detekt = "1.23.8"
 android-gradle-plugin = "8.13.2"
 easylauncher = "6.4.1"