change naming

Author: cherylEnkidu

firebase-firestore/src/test/java/com/google/firebase/firestore/model/TargetIndexMatcherTest.java

@@ -58,7 +58,7 @@ public class TargetIndexMatcherTest {
           query("collId")
               .filter(filter("a", "array-contains-any", Collections.singletonList("a"))));
 
-  List<Query> queriesWithOrderBy =
+  List<Query> queriesWithOrderBys =
       Arrays.asList(
           query("collId").orderBy(orderBy("a")),
           query("collId").orderBy(orderBy("a", "desc")),
@@ -665,7 +665,7 @@ public void testBuildTargetIndexWithQueriesWithArrayContains() {
 
   @Test
   public void testBuildTargetIndexWithQueriesWithOrderBy() {
-    for (Query query : queriesWithOrderBy) {
+    for (Query query : queriesWithOrderBys) {
       validateBuildTargetIndexCreateFullMatchIndex(query);
     }
   }