add syntax highlighting

Author: Nadia-JSch

docs/auto-discovery/cloud-auto-discovery/aws-autodiscovery.mdx

@@ -153,7 +153,7 @@ Note that some Discovery items require enabling the feature and cannot be discov
 <details>
   <summary>Click to expand code example</summary>
 
-  ```
+  ```js
   {
     "Version": "2012-10-17",
     "Statement": [
@@ -380,7 +380,7 @@ When **Use Environment Credentials** is enabled, the discovery job can be saved
         <details>
           <summary>Click to expand code example</summary>
 
-          ```
+          ```js
           {
               "Version": "2012-10-17",
               "Statement": [
@@ -411,7 +411,7 @@ When **Use Environment Credentials** is enabled, the discovery job can be saved
           <details>
             <summary>Click to expand code example</summary>
 
-            ```
+            ```js
             {
                 "Version": "2012-10-17",
                 "Statement": [
@@ -443,7 +443,7 @@ When **Use Environment Credentials** is enabled, the discovery job can be saved
         <details>
           <summary>Click to expand code example</summary>
 
-          ```
+          ```js
           {
               "Version": "2012-10-17",
               "Statement": [
@@ -480,7 +480,7 @@ When **Use Environment Credentials** is enabled, the discovery job can be saved
         <details>
           <summary>Click to expand code example</summary>
 
-          ```
+          ```js
           {
               "Version": "2012-10-17",
               "Statement": [