Updates code samples to use gemini 2.5 flash instead of gemini 2.0 flash (#13509)

Author: br1mendez

genai/batch_prediction/batchpredict_with_bq.py

@@ -28,7 +28,7 @@ def generate_content(output_uri: str) -> str:
     job = client.batches.create(
         # To use a tuned model, set the model param to your tuned model using the following format:
         # model="projects/{PROJECT_ID}/locations/{LOCATION}/models/{MODEL_ID}
-        model="gemini-2.0-flash-001",
+        model="gemini-2.5-flash",
         src="bq://storage-samples.generative_ai.batch_requests_for_multimodal_input",
         config=CreateBatchJobConfig(dest=output_uri),
     )

genai/batch_prediction/batchpredict_with_gcs.py

@@ -28,7 +28,7 @@ def generate_content(output_uri: str) -> str:
     job = client.batches.create(
         # To use a tuned model, set the model param to your tuned model using the following format:
         # model="projects/{PROJECT_ID}/locations/{LOCATION}/models/{MODEL_ID}
-        model="gemini-2.0-flash-001",
+        model="gemini-2.5-flash",
         # Source link: https://storage.cloud.google.com/cloud-samples-data/batch/prompt_for_batch_gemini_predict.jsonl
         src="gs://cloud-samples-data/batch/prompt_for_batch_gemini_predict.jsonl",
         config=CreateBatchJobConfig(dest=output_uri),