Fix field typo to plural (firebase#28)

bodadotsh · web-flow · commit f003ef8c725f · 2020-06-05T13:27:21.000-04:00
The sample data shows the field is named 'regions', not 'region'
diff --git a/firestore/test.firestore.js b/firestore/test.firestore.js
@@ -868,7 +868,7 @@ describe("firestore", () => {
                 // [END in_filter]
 
                 // [START in_filter_with_array]
-                citiesRef.where('region', 'in',
+                citiesRef.where('regions', 'in',
                     [['west_coast', 'east_coast']]);
                 // [END in_filter_with_array]
             });
