Fix typo error in human-in-the-loop.md

[christiansita]

Fixed typo error text in the Handling Requests and Responses section.

[learn-build-service-prod]

Learn Build status updates of commit fb31a20:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
agent-framework/get-started/hosting.md	⚠️Warning		Details
agent-framework/workflows/human-in-the-loop.md	✅Succeeded

agent-framework/get-started/hosting.md

• Line 143, Column 1: [Warning: invalid-code] The code snippet "~/../agent-framework-code/python/samples/04-hosting/azure_functions/01_single_agent/function_app.py" could not be found.
• Line 147, Column 1: [Warning: invalid-code] The code snippet "~/../agent-framework-code/python/samples/04-hosting/azure_functions/01_single_agent/function_app.py" could not be found.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.