Update README.md

Author: rebel-jonghewk

README.md

@@ -7,7 +7,7 @@
 </picture>
 
 [![PyPI version](https://badge.fury.io/py/vllm-rbln.svg)](https://badge.fury.io/py/vllm-rbln)
-[![License](https://img.shields.io/github/license/rebellions-sw/vllm-rbln)](https://github.com/rebellions-sw/vllm-rbln/blob/dev/LICENSE)
+[![License](https://img.shields.io/github/license/rebellions-sw/vllm-rbln)](https://github.com/rebellions-sw/vllm-rbln/blob/main/LICENSE)
 [![Documentation](https://img.shields.io/badge/docs-available-brightgreen)](https://docs.rbln.ai/software/model_serving/vllm_support/vllm-rbln.html)
 [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](./CODE_OF_CONDUCT.md)
 </div>