fix(docs): correct typos in TypeScript examples in structured-output.mdx (#1358)

## Overview
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## Type of change

**Type:** [Replace with: New documentation page / Update existing
documentation / Fix typo/bug/link/formatting / Remove outdated content /
Other]

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## Checklist
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- [x] I have read the [contributing guidelines](README.md)
- [ ] I have tested my changes locally using `docs dev`
- [ ] All code examples have been tested and work correctly
- [ ] I have used **root relative** paths for internal links
- [ ] I have updated navigation in `src/docs.json` if needed
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## Additional notes
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Author: ooboqoo

src/oss/langchain/structured-output.mdx

@@ -235,7 +235,7 @@ LangChain automatically uses `ProviderStrategy` when you pass a schema type dire
         messages: [{"role": "user", "content": "Extract contact info from: John Doe, john@example.com, (555) 123-4567"}]
     });
 
-    result.structuredResponse;
+    console.log(result.structuredResponse);
     // { name: "John Doe", email: "john@example.com", phone: "(555) 123-4567" }
     ```
 
@@ -263,7 +263,7 @@ LangChain automatically uses `ProviderStrategy` when you pass a schema type dire
         messages: [{"role": "user", "content": "Extract contact info from: John Doe, john@example.com, (555) 123-4567"}]
     });
 
-    result.structuredResponse;
+    console.log(result.structuredResponse);
     // { name: "John Doe", email: "john@example.com", phone: "(555) 123-4567" }
     ```
 </CodeGroup>
@@ -586,7 +586,7 @@ function toolStrategy<StructuredResponseT>(
         responseFormat: toolStrategy(ProductReview)
     })
 
-    result = agent.invoke({
+    const result = await agent.invoke({
         "messages": [{"role": "user", "content": "Analyze this review: 'Great product: 5 out of 5 stars. Fast shipping, but expensive'"}]
     })