Update spotlessGradle to v7.1.0 (#63)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ gradleGitVersioning = "6.4.4"
 gradleVersions = "0.51.0"
 jacoco = "0.8.8"
 junit = "5.13.3"
-spotlessGradle = "7.0.4"
+spotlessGradle = "7.1.0"
 
 [libraries]
 gradleMavenPublishPlugin = { module = "com.vanniktech:gradle-maven-publish-plugin", version.ref = "gradleMavenPublish" }