chore(aiplatform): Update CreateBatchPredictionGeminiBigqueryJobSample to use gemini 2.5 (#10229)

Author: amcolin

aiplatform/src/main/java/aiplatform/batchpredict/CreateBatchPredictionGeminiBigqueryJobSample.java

@@ -66,7 +66,7 @@ public static BatchPredictionJob createBatchPredictionGeminiBigqueryJobSample(
       String modelName =
           String.format(
               "projects/%s/locations/%s/publishers/google/models/%s",
-              project, location, "gemini-2.0-flash-001");
+              project, location, "gemini-2.5-flash");
 
       BatchPredictionJob batchPredictionJob =
           BatchPredictionJob.newBuilder()