Update all dependencies to v7

| datasource | package                                                   | from   | to    |
| ---------- | --------------------------------------------------------- | ------ | ----- |
| maven      | com.diffplug.spotless:com.diffplug.spotless.gradle.plugin | 6.23.2 | 7.0.1 |
| maven      | com.diffplug.spotless:spotless-plugin-gradle              | 6.23.2 | 7.0.1 |

Author: renovate[bot]

libs.versions.toml

@@ -19,7 +19,7 @@ kover = "0.8.1"
 kotest = "5.8.0"
 assertj-core = "3.24.2"
 detekt = "1.23.4"
-spotless = "6.23.2"
+spotless = "7.0.1"
 apache-log4j = "2.22.0"
 testLogger = "4.0.0"
 jetbrains-annotations = "26.0.0"