Update sf.md

README.md

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 ## 源码仓库及问题反馈
-* [https://developer.hpccube.com/codes/modelzoo/fastfold_pytorch](https://developer.hpccube.com/codes/modelzoo/fastfold_pytorch)
+* [https://developer.sourcefind.cn/codes/modelzoo/fastfold_pytorch](https://developer.sourcefind.cn/codes/modelzoo/fastfold_pytorch)
 
 ## 参考资料
 * [https://github.com/deepmind/alphafold](https://github.com/deepmind/alphafold)