Fix ZonePickerSettingsTest due to string change

The change with id I1fb3e2abf80da3cb53cfbc3363bbe46e40a6ac22 broke the
test

Bug: 76209571
Test: atest SettingsUITests:ZonePickerSettingsTest
Change-Id: I6676e8669e1f396c9588e3096b62cc6aedcc38a9

tests/uitests/src/com/android/settings/ui/ZonePickerSettingsTest.java

@@ -128,7 +128,7 @@ public class ZonePickerSettingsTest {
 
         // Only select time zone explicitly if there are more than one time zones in a region
         if (!assumeOneTimeZoneInRegion) {
-            wait(By.text("Time Zone"));
+            wait(By.text("Time zone"));
             selectItemInList(new UiSelector().textContains(timezone))
                     .click();
         }