Bump com.diffplug.spotless from 6.4.1 to 6.4.2

Bumps com.diffplug.spotless from 6.4.1 to 6.4.2.

---
updated-dependencies:
- dependency-name: com.diffplug.spotless
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -12,7 +12,7 @@ plugins {
     distribution
     kotlin("jvm") version "1.6.10"
     id("com.github.spotbugs") version "5.0.6"
-    id("com.diffplug.spotless") version "6.4.1"
+    id("com.diffplug.spotless") version "6.4.2"
     id("com.github.kt3k.coveralls") version "2.12.0"
     // works with GraalVM-CE Java11
     id("org.mikeneck.graalvm-native-image") version "1.4.1"