fix DateIndexNameProcessorTests offset pattern (#38069)

`XX` was being used to represent an offset pattern,
it should be `ZZ`

Fixes #38067.

Author: talevy

modules/ingest-common/src/test/java/org/elasticsearch/ingest/common/DateIndexNameProcessorTests.java

@@ -79,11 +79,10 @@ public void testUnix()throws Exception {
         assertThat(document.getSourceAndMetadata().get("_index"), equalTo("<events-{19700101||/m{yyyyMMdd|UTC}}>"));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/38067")
     public void testTemplatedFields() throws Exception {
         String indexNamePrefix = randomAlphaOfLength(10);
         String dateRounding = randomFrom("y", "M", "w", "d", "h", "m", "s");
-        String indexNameFormat = randomFrom("yyyy-MM-dd'T'HH:mm:ss.SSSXX", "yyyyMMdd", "MM/dd/yyyy");
+        String indexNameFormat = randomFrom("yyyy-MM-dd'T'HH:mm:ss.SSSZZ", "yyyyMMdd", "MM/dd/yyyy");
         String date = Integer.toString(randomInt());
         Function<String, DateTime> dateTimeFunction = DateFormat.Unix.getFunction(null, DateTimeZone.UTC, null);