build: Bump Spotless to 8.8.0

Update the Spotless Gradle plugin to the latest available release.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: adinauer

gradle/libs.versions.toml

@@ -37,7 +37,7 @@ sagp = "6.10.0"
 sqlite = "2.6.2"
 sqliteAlpha = "2.7.0-alpha06" # Required by Room3 3.0.0-alpha*
 slf4j = "1.7.30"
-spotless = "8.7.0"
+spotless = "8.8.0"
 springboot2 = "2.7.18"
 springboot3 = "3.5.0"
 springboot4 = "4.1.0"