Update dependency com.diffplug.spotless:spotless-plugin-gradle to v6.…

…15.0 (#7689)

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

gradle/libs.versions.toml

@@ -43,7 +43,7 @@ gradlePlugin-graal = "com.palantir.graal:gradle-graal:0.12.0"
 gradlePlugin-kotlin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "org-jetbrains-kotlin" }
 gradlePlugin-mavenPublish = "com.vanniktech:gradle-maven-publish-plugin:0.23.2"
 gradlePlugin-shadow = "gradle.plugin.com.github.johnrengelman:shadow:7.1.2"
-gradlePlugin-spotless = "com.diffplug.spotless:spotless-plugin-gradle:6.14.1"
+gradlePlugin-spotless = "com.diffplug.spotless:spotless-plugin-gradle:6.15.0"
 guava-jre = "com.google.guava:guava:31.1-jre"
 hamcrestLibrary = "org.hamcrest:hamcrest-library:2.2"
 httpClient5 = "org.apache.httpcomponents.client5:httpclient5:5.2.1"