update the Checkstyle tool to v12.1.0

stephengold · stephengold · commit dd394b646c3d · 2025-10-21T13:31:30.000-07:00
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -2,7 +2,7 @@
 
 [versions]
 
-checkstyle = "12.0.1"
+checkstyle = "12.1.0"
 
 [libraries]
 
