Fix test

Author: carlosdelest

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/VerifierTests.java

@@ -2478,7 +2478,7 @@ public void testMultiMatchTargetsExistingField() throws Exception {
     public void testMultiMatchInsideEval() throws Exception {
         assumeTrue("MultiMatch operator is available just for snapshots", Build.current().isSnapshot());
         assertEquals(
-            "1:36: [MultiMatch] function is only supported in WHERE commands\n"
+            "1:36: [MultiMatch] function is only supported in WHERE and STATS ... WHERE commands\n"
                 + "line 1:55: [MultiMatch] function cannot operate on [title], which is not a field from an index mapping",
             error("row title = \"brown fox\" | eval x = multi_match(\"fox\", title)")
         );