Update api/assistant/create-assistant-message.mdx (#2416)

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: ethanpalm

api/assistant/create-assistant-message.mdx

@@ -33,6 +33,13 @@ function MyComponent({ domain }) {
     body: {
       fp: 'anonymous',
       retrievalPageSize: 5,
+      context: [
+        {
+          type: 'code',
+          value: 'const example = "code snippet";',
+          elementId: 'code-block-1',
+        },
+      ],
     },
     streamProtocol: 'data',
     sendExtraMessageFields: true,
@@ -61,6 +68,12 @@ function MyComponent({ domain }) {
 - `body.fp` - Fingerprint identifier (use 'anonymous' or a user identifier).
 - `body.retrievalPageSize` - Number of search results to use (recommended: 5).
 
+**Optional configuration:**
+- `body.context` - Array of contextual information to provide to the assistant. Each context object contains:
+  - `type` - Either `'code'` or `'textSelection'`.
+  - `value` - The code snippet or selected text content.
+  - `elementId` (optional) - Identifier for the UI element containing the context.
+
 </Step>
 </Steps>