Update plugin spotless to v8.1.0 (#179)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ binaryCompatibilityValidator = { id = "org.jetbrains.kotlinx.binary-compatibilit
 dokka = { id = "org.jetbrains.dokka", version = "1.9.20" }
 ksp = { id = "com.google.devtools.ksp", version.ref = "ksp" }
 mavenPublish = { id = "com.vanniktech.maven.publish", version = "0.35.0" }
-spotless = { id = "com.diffplug.spotless", version = "8.0.0" }
+spotless = { id = "com.diffplug.spotless", version = "8.1.0" }
 
 [libraries]
 autoService-annotations = { module = "com.google.auto.service:auto-service-annotations", version.ref = "autoService" }