[Docs] Add media kit (#11121)

Author: simon-mo

README.md

@@ -134,3 +134,7 @@ If you use vLLM for your research, please cite our [paper](https://arxiv.org/abs
 * For coordinating contributions and development, please use Slack.
 * For security disclosures, please use Github's security advisory feature.
 * For collaborations and partnerships, please contact us at vllm-questions AT lists.berkeley.edu.
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+## Media Kit
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+* If you wish to use vLLM's logo, please refer to [our media kit repo](https://github.com/vllm-project/media-kit).