Fix expected value in test

Author: nmemond

v2/datastream-to-spanner/src/test/java/com/google/cloud/teleport/v2/templates/PostgreSQLDatastreamToSpannerDataTypesIT.java

@@ -556,7 +556,7 @@ private Map<String, List<Map<String, Object>>> getExpectedData() {
     result.put("json", createRows("{\"duplicate_key\":1}", "{\"null_key\":null}", "NULL"));
     result.put(
         "json_to_string",
-        createRows("{\"duplicate_key\": 1, \"duplicate_k...", "{\"null_key\": null}", "NULL"));
+        createRows("{\"duplicate_key\": 2", "{\"null_key\": null}", "NULL"));
     result.put("jsonb", createRows("{\"duplicate_key\":2}", "{\"null_key\":null}", "NULL"));
     result.put(
         "jsonb_to_string", createRows("{\"duplicate_key\": 2}", "{\"null_key\": null}", "NULL"));