Fix EsqlNodeSubclassTests#testReplaceChildren

Author: kderusso

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/string/ExtractSnippets.java

@@ -191,7 +191,8 @@ public Expression replaceChildren(List<Expression> newChildren) {
             newChildren.get(0), // field
             newChildren.get(1), // str
             numSnippets == null ? null : newChildren.get(2),
-            snippetLength == null ? null : newChildren.get(3)
+            snippetLength == null ? null : newChildren.get(3),
+            queryBuilder
         );
     }