ci(deps): update spotless (#475)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 plugin-publish = "2.1.1"
 test-logger = "4.0.0"
 kover = "0.9.8"
-spotless = "8.6.0"
+spotless = "8.7.0"
 gson = "2.14.0"
 stonecutter = "0.9+"
 architectury-loom = "1.17.487"