document sources for jvm compatibility

Author: razvan

kafka/boil-config.toml

@@ -38,6 +38,7 @@ scala-version = "2.13"
 jmx-exporter-version = "1.3.0"
 
 [versions."4.2.1".local-images]
+# For JVM compatibility see README.md and docs/getting-started/compatibility.md in the Kafka repository
 java-base = "25"
 java-devel = "25"
 "kafka/kcat" = "1.7.0"