chore(deps): update plugin com.diffplug.spotless to v8.4.0

Author: renovate[bot]

settings.gradle.kts

@@ -8,7 +8,7 @@ dependencyResolutionManagement {
     versionCatalogs {
         create("libs") {
             version("junit", "6.0.3")
-            version("spotless", "8.3.0")
+            version("spotless", "8.4.0")
             version("aws-java-nio-spi-for-s3", "2.3.0")
             version("bluemap", "5.3")
             version("shadow", "9.3.2")