Use a safe cast in DerbySqlAstTranslator

Author: gavinking

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbySqlAstTranslator.java

@@ -244,8 +244,7 @@ protected void renderPartitionItem(Expression expression) {
 		if ( expression instanceof Literal ) {
 			appendSql( "'0'" );
 		}
-		else if ( expression instanceof Summarization ) {
-			Summarization summarization = (Summarization) expression;
+		else if ( expression instanceof Summarization summarization ) {
 			appendSql( summarization.getKind().sqlText() );
 			appendSql( OPEN_PARENTHESIS );
 			renderCommaSeparated( summarization.getGroupings() );