updated google tokenizer

app.py

@@ -93,7 +93,7 @@ def main():
                     temperature=temperature,
                     max_tokens=MAX_OUTPUT_TOKENS
                 )
-                Settings.tokenizer = tokenization.get_tokenizer_for_model(llm_name) #.count_tokens
+                Settings.tokenizer = tokenization.get_tokenizer_for_model(llm_name).compute_tokens
                 Settings.num_output = MAX_OUTPUT_TOKENS
                 Settings.embed_model = GeminiEmbedding(
                     model_name="models/text-embedding-004", api_key=os.environ.get("GOOGLE_API_KEY") #, title="this is a document"