fix(deps): update dependency checkstyle to v10.20.1

conventions/src/main/kotlin/otel.java-conventions.gradle.kts

@@ -434,7 +434,7 @@ codenarc {
 checkstyle {
   configFile = rootProject.file("buildscripts/checkstyle.xml")
   // this version should match the version of google_checks.xml used as basis for above configuration
-  toolVersion = "10.20.0"
+  toolVersion = "10.20.1"
   maxWarnings = 0
 }