Add FAQ badge to README (#97)

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Author: lostella

README.md

@@ -5,6 +5,7 @@
 
 [![preprint](https://img.shields.io/static/v1?label=arXiv&message=2403.07815&color=B31B1B&logo=arXiv)](https://arxiv.org/abs/2403.07815)
 [![huggingface](https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Models-FFD21E)](https://huggingface.co/collections/amazon/chronos-models-65f1791d630a8d57cb718444)
+[![faq](https://img.shields.io/badge/FAQ-Questions%3F-blue)](https://github.com/amazon-science/chronos-forecasting/issues?q=is%3Aissue+label%3AFAQ)
 [![License: MIT](https://img.shields.io/badge/License-Apache--2.0-green.svg)](https://opensource.org/licenses/Apache-2.0)
 </div>