[Doc] Fix: Correct vLLM announcing blog post link in docs (#31868)

Signed-off-by: enfinity <festusowumi@gmail.com>

docs/README.md

@@ -62,7 +62,7 @@ vLLM is flexible and easy to use with:
 
 For more information, check out the following:
 
-- [vLLM announcing blog post](https://vllm.ai) (intro to PagedAttention)
+- [vLLM announcing blog post](https://blog.vllm.ai/2023/06/20/vllm.html) (intro to PagedAttention)
 - [vLLM paper](https://arxiv.org/abs/2309.06180) (SOSP 2023)
 - [How continuous batching enables 23x throughput in LLM inference while reducing p50 latency](https://www.anyscale.com/blog/continuous-batching-llm-inference) by Cade Daniel et al.
 - [vLLM Meetups](community/meetups.md)