Update dependency com.diffplug.spotless:spotless-plugin-gradle to v8 (#1706)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -21,7 +21,7 @@ kotlin-gradle-plugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", v
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test" }
 kotlin-test-junit = { module = "org.jetbrains.kotlin:kotlin-test-junit" }
 kotlin-time = { module = "org.jetbrains.kotlinx:kotlinx-datetime", version = "0.7.1-0.6.x-compat" }
-spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version = "7.2.1" }
+spotless = { module = "com.diffplug.spotless:spotless-plugin-gradle", version = "8.0.0" }
 test-assertj = { module = "org.assertj:assertj-core", version = "3.27.6" }
 test-assertk = "com.willowtreeapps.assertk:assertk:0.28.1"
 test-jimfs = "com.google.jimfs:jimfs:1.3.1"