Update dependency com.diffplug.spotless:spotless-plugin-gradle to v8.1.0 (#164)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [libraries]
 androidPlugin = "com.android.tools.build:gradle:8.13.1"
 gradleMavenPublishPlugin = "com.vanniktech:gradle-maven-publish-plugin:0.35.0"
-spotlessPlugin = "com.diffplug.spotless:spotless-plugin-gradle:8.0.0"
+spotlessPlugin = "com.diffplug.spotless:spotless-plugin-gradle:8.1.0"
 
 googleJavaFormat = "com.google.googlejavaformat:google-java-format:1.32.0"