Fix merge

Author: carlosdelest

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/planner/EsqlExpressionTranslators.java

@@ -545,7 +545,7 @@ protected Query asQuery(QueryString queryString, TranslatorHandler handler) {
     public static class KqlFunctionTranslator extends ExpressionTranslator<Kql> {
         @Override
         protected Query asQuery(Kql kqlFunction, TranslatorHandler handler) {
-            return new KqlQuery(kqlFunction.source(), kqlFunction.queryAsObject());
+            return new KqlQuery(kqlFunction.source(), (String) kqlFunction.queryAsObject());
         }
     }
 }