Update dependency com.diffplug.spotless:spotless-plugin-gradle to v7 (#206)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

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 = "1.9.25"
     const val ben_manes = "0.52.0"
-    const val spotless = "5.17.1"
+    const val spotless = "7.2.1"
     const val detekt = "1.23.8"
     const val ktlint = "10.3.0"
     const val dokka = "0.10.1"