Update dependency com.diffplug.gradle.spotless to v8.6.0

| datasource | package                                                                 | from  | to    |
| ---------- | ----------------------------------------------------------------------- | ----- | ----- |
| maven      | com.diffplug.gradle.spotless:com.diffplug.gradle.spotless.gradle.plugin | 8.1.0 | 8.6.0 |

Author: renovate[bot]

gradle/libs.versions.toml

@@ -42,7 +42,7 @@ ktor = "3.2.3"
 kmp-viewmodel = "0.8.0"
 uuid = "0.8.4"
 
-spotless = "8.1.0"
+spotless = "8.6.0"
 detekt = "1.23.8"
 kotlinx-kover = "0.9.3"
 dokka = "2.1.0"