Update dependency com.diffplug.gradle.spotless to v7 (#343)

| datasource | package                                                                 | from   | to    |
| ---------- | ----------------------------------------------------------------------- | ------ | ----- |
| maven      | com.diffplug.gradle.spotless:com.diffplug.gradle.spotless.gradle.plugin | 6.25.0 | 7.0.0 |

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

gradle/libs.versions.toml

@@ -42,7 +42,7 @@ ktor = "3.0.1"
 kmp-viewmodel = "0.8.0"
 uuid = "0.8.4"
 
-spotless = "6.25.0"
+spotless = "7.0.0"
 detekt = "1.23.7"
 kotlinx-kover = "0.9.0"
 dokka = "2.0.0"