minor update

Author: narengogi

integrations/llms/vertex-ai.mdx

@@ -487,10 +487,10 @@ Note that you will have to set [`strict_open_ai_compliance=False`](/product/ai-g
 </CodeGroup>
 
 <Note>
-    To disable thinking for gemini models like `google.gemini-2.5-flash-preview-04-17`, you are required to explicitly set `budget_tokens` to `0` and `type` to `disabled`.
+    To disable thinking for gemini models like `google.gemini-2.5-flash-preview-04-17`, you are required to explicitly set `budget_tokens` to `0`.
     ```json
     "thinking": {
-        "type": "disabled",
+        "type": "enabled",
         "budget_tokens": 0
     }
     ```