Fix typo
Fix typo

Should be `java.math.BigDecimal`
apache/incubator-groovy,apache/groovy,apache/incubator-groovy,apache/groovy,apache/groovy,paulk-asert/groovy,paulk-asert/groovy,apache/incubator-groovy,apache/incubator-groovy,paulk-asert/groovy,apache/groovy,paulk-asert/groovy