Adding Foundry links

Locate the README.md file in the root of the project and add the following content at the bottom of the file if the links do not already exist in the README.md file.

```
## Additional Resources

If you get stuck or have any questions about building AI apps, join our [Azure AI Foundry Community Discord](https://discord.com/invite/kzRShWzttr)
If you have product feedback or errors while building visit our [Azure AI Foundry Developer Forum](https://github.com/orgs/azure-ai-foundry/discussions)
```

Use the appropriate heading size to fit with the rest of the README's style.