Update README.md

README.md

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 # Alpie Core: 4-bit Quantized Reasoning Model
 
-📄 **[Technical Report: Alpie Core.pdf](./Alpie_Core (HF).pdf)**
+📄 **[Technical Report: Alpie Core.pdf](./Alpie_Core.pdf)**
 
 <p align="center">
   <a href="https://169pi.ai/"><img src="https://img.shields.io/badge/🌐%20Website-169Pi%20AI-blue" alt="Website"></a>