Updated Amplify doc to add sdk v3 code (#7674)

* added sdk v3 code

* updated the sdk v3 code as per the suggestions

---------

Co-authored-by: meghasv09 <meghasomaradder2@gmail.com>

Author: meghasomaradder

src/pages/gen1/[platform]/build-a-backend/functions/secrets/index.mdx

@@ -77,6 +77,10 @@ To access the secret values in your Lambda function, use the [AWS SSM GetParamet
 
 If your Lambda function is using the Node.js runtime, a comment block will be placed at the top of your `index.js` file with example code to retrieve the secret values.
 
+<BlockSwitcher>
+
+<Block name='AWS SDK V2'>
+
 ```js
 const aws = require('aws-sdk');
 
@@ -89,6 +93,35 @@ const { Parameters } = await (new aws.SSM())
 
 // Parameters will be of the form { Name: 'secretName', Value: 'secretValue', ... }[]
 ```
+</Block>
+
+<Block name='AWS SDK V3'>
+
+```js
+const { SSMClient, GetParametersCommand } = require("@aws-sdk/client-ssm");
+
+const client = new SSMClient();
+
+const command = new GetParametersCommand({
+  Names: ["EXAMPLE_SECRET_1", "EXAMPLE_SECRET_2"].map(
+    (secretName) => process.env[secretName]
+  ),
+  WithDecryption: true,
+});
+
+client
+  .send(command)
+  .then((response) => {
+    const { Parameters } = response;
+    console.log(Parameters);
+  })
+  .catch((error) => {
+    console.error(error);
+  });
+```
+</Block>
+
+</BlockSwitcher>
 
 ## Multi-environment flows
 When creating a new Amplify environment using `amplify env add`, Amplify CLI asks if you want to apply all secret values to the new environment or modify them. If you choose to apply the existing values, you can still make edits anytime using `amplify update function`.