Fix merge error

Author: julian-elastic

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/LogicalPlanOptimizerTests.java

@@ -6146,7 +6146,7 @@ public void testReplaceStringCasingWithInsensitiveEqualsLowerTrue() {
     public void testReplaceStringCasingWithInsensitiveEqualsEquals() {
         for (var fn : List.of("TO_LOWER", "TO_UPPER")) {
             var value = fn.equals("TO_LOWER") ? fn.toLowerCase(Locale.ROOT) : fn.toUpperCase(Locale.ROOT);
-            value += "�✈��"; // these should not cause folding, they're not in the upper/lower char class
+            value += "🐔✈🔥🎉"; // these should not cause folding, they're not in the upper/lower char class
             var plan = optimizedPlan("FROM test | WHERE " + fn + "(first_name) == \"" + value + "\"");
             var limit = as(plan, Limit.class);
             var filter = as(limit.child(), Filter.class);
@@ -6161,7 +6161,7 @@ public void testReplaceStringCasingWithInsensitiveEqualsEquals() {
     public void testReplaceStringCasingWithInsensitiveEqualsNotEquals() {
         for (var fn : List.of("TO_LOWER", "TO_UPPER")) {
             var value = fn.equals("TO_LOWER") ? fn.toLowerCase(Locale.ROOT) : fn.toUpperCase(Locale.ROOT);
-            value += "�✈��"; // these should not cause folding, they're not in the upper/lower char class
+            value += "🐔✈🔥🎉"; // these should not cause folding, they're not in the upper/lower char class
             var plan = optimizedPlan("FROM test | WHERE " + fn + "(first_name) != \"" + value + "\"");
             var limit = as(plan, Limit.class);
             var filter = as(limit.child(), Filter.class);