Update README.md

Author: DefTruth

README.md

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-    <h2>📚 Modern CUDA Learn Notes with PyTorch for Beginners 🐑</h2>
+    <h2>📚 LeetCUDA: Modern CUDA Learn Notes with PyTorch for Beginners 🐑</h2>
     <a href="#cuda-kernel">📚200+ CUDA Kernels</a> | <a href="#my-blogs-part-1"> 📚100+ LLM/VLM/CUDA Blogs</a> | <a href="#hgemm-tensorcores-mma-bench"> ⚡️HGEMM MMA</a> | <a href="#fa-mma-bench"> ⚡️FA-2 MMA </a> <p>
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   <img src='https://github.com/user-attachments/assets/9306862b-2a30-4a87-bb33-0fde9e9d7cea' width=250 >