Update README.md

Author: lmangani

README.md

@@ -36,14 +36,18 @@ $ ./deploy.sh
 
 <img src="https://images.ctfassets.net/o7xu9whrs0u9/5XE0x5uBoOA4oJYZFwzNea/79493c8495c8d60c726cfeeae73a2b84/create_function.png" align="left">
 
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 ➡ Choose **Container Image** and use the **chDB ECR** instance URI you created
 
 <img src="https://user-images.githubusercontent.com/1423657/250210923-887894c3-35ef-4083-a4b8-29d247f1fc1c.png" align="left">
 
 
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 ➡ Click **Create Function** at the bottom right when you’re done.
 
@@ -55,7 +59,9 @@ Let's **test** our new **chDB Lambda** using a *simple query.*
 
 The Lamba expects JSON requests with a **query** key:
 
-```plaintext
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+```bash
+curl -XPOST "http://{lambda_url}/2015-03-31/functions/function/invocations" -d 
 {
    'query': 'SELECT version()',
    'default_format': 'CSV'
@@ -72,6 +78,7 @@ You can also use the Browser and the AWS Console to generate **test events**:
 
 <img src="https://user-images.githubusercontent.com/1423657/250201531-daa26b0b-68e2-4cec-b665-5505efe99b99.png" align="left">
 
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