readme : update hot topics

Author: ggerganov

README.md

@@ -10,7 +10,7 @@ Inference of [LLaMA](https://arxiv.org/abs/2302.13971) model in pure C/C++
 
 ### Hot topics
 
-- *No hot topics atm. Open to suggestions about what is hot today*
+- Collecting Apple Silicon performance stats: https://github.com/ggerganov/llama.cpp/discussions/4167
 
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