Update README.md (#375)

* Update README.md

* Update README.md

Author: DefTruth

README.md

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     <h2>📚 LeetCUDA: Modern CUDA Learn Notes with PyTorch for Beginners 🐑</h2>
-    <img src='https://github.com/user-attachments/assets/b2578723-b7a7-4d8f-bcd1-5008947b808a' width="360" height="56" >
-    <a href="https://hellogithub.com/repository/98348655a96640ca8ddcbc298edc901d" target="_blank"><img src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=98348655a96640ca8ddcbc298edc901d&claim_uid=ofSCbzTmdeQk3FD&theme=dark" alt="Featured｜HelloGitHub" style="width: 250px; height: 54px;" width="250" height="54" /></a>
+    <img src='https://github.com/user-attachments/assets/b2578723-b7a7-4d8f-bcd1-5008947b808a' width="700">
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     <a href="#contribute">🔥🔥 PR Welcome: Add Your Kernel to LeetCUDA! Let's make it Awesome together! 🎉🎉</a> <br>
     <a href=https://github.com/xlite-dev/LeetCUDA/graphs/contributors > <img src=https://opencollective.com/leetcuda/contributors.svg height=40px > </a>
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+  <a href="https://hellogithub.com/repository/98348655a96640ca8ddcbc298edc901d" target="_blank"><img src="https://api.hellogithub.com/v1/widgets/recommend.svg?rid=98348655a96640ca8ddcbc298edc901d&claim_uid=ofSCbzTmdeQk3FD&theme=dark" alt="Featured｜HelloGitHub" style="width: 250px; height: 54px;" width="250" height="54" /></a> 
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