Update plugin spotless to v8.5.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -22,7 +22,7 @@ kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 dokka = { id = "org.jetbrains.dokka", version = "2.2.0" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
-spotless = { id = "com.diffplug.spotless", version = "8.4.0" }
+spotless = { id = "com.diffplug.spotless", version = "8.5.1" }
 mavenPublish = { id = "com.vanniktech.maven.publish", version = "0.36.0" }
 kotlinBinaryCompatibilityValidator = { id = "org.jetbrains.kotlinx.binary-compatibility-validator", version = "0.18.1" }