Update spotless to v8 (#2626)

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

gradle/libs.versions.toml

@@ -29,7 +29,7 @@ moko-resources = "0.25.0"
 okhttp = "5.1.0"
 okio = "3.16.0"
 splitties = "3.0.0"
-spotless = "7.2.1"
+spotless = "8.0.0"
 telephoto = "0.17.0"
 xmlutil = "0.91.2"
 junit = "1.3.0"