Update x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/QueryString.java

Co-authored-by: Carlos Delgado <[email protected]>

Author: svilen-mihaylov-elastic

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/fulltext/QueryString.java

@@ -254,7 +254,7 @@ public QueryString(
                     description = "Coordinated Universal Time (UTC) offset or IANA time zone used to convert date values in the "
                         + "query string to UTC."
                 ), },
-            description = "Additional options for Query String as <<esql-function-named-params,function named parameters>>."
+            description = "(Optional) Additional options for Query String as <<esql-function-named-params,function named parameters>>."
                 + " See <<query-dsl-query-string-query,query string query>> for more information.",
             optional = true
         ) Expression options