Update plugin spotless to v7

Author: renovate[bot]

Diff for: gradle/libs.versions.toml

@@ -10,6 +10,6 @@ coroutines = "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0"
 
 [plugins]
 kotlinJvm = { id = "org.jetbrains.kotlin.jvm", version = "2.0.20" }
-spotless = { id = "com.diffplug.spotless", version = "6.25.0" }
+spotless = { id = "com.diffplug.spotless", version = "7.0.2" }
 publish = { id = "com.vanniktech.maven.publish", version = "0.29.0" }
 dokka = { id = "org.jetbrains.dokka", version = "1.9.20" }