Update spotless to 8.1.0 (#4323)

Author: Reabstraction

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ forge = "47.3.0"
 minecraftForge = "1.20.1-47.3.0"
 parchment = "2023.09.03" # https://parchmentmc.org/docs/getting-started
 shadow = "8.3.5"
-spotless = "7.0.2"
+spotless = "8.1.0"
 modDevGradle = "2.0.86"
 lombok = "8.14"
 jetbrains-annotations = "26.0.1"