fix link

Author: tushushu

README.rst

@@ -27,7 +27,7 @@ Performance
 - same level efficient on the ``integer`` array,
 - and a bit slower on the ``floating`` array.
 
-Faster than Numpy is not the target of writing this repo, because they are just two different libraries. Ulist is more focused on general domain rather than just data science/machine learning/AI, for example the Linear Algebra Computation is not provided. But if you are curious about the performance, please see the `benchmarking results <https://github.com/tushushu/ulist/blob/main/benchmark.md>`__.
+Faster than Numpy is not the target of writing this repo, because they are just two different libraries. Ulist is more focused on general domain rather than just data science/machine learning/AI, for example the Linear Algebra Computation is not provided. But if you are curious about the performance, please see the `benchmarking results <https://github.com/tushushu/ulist/blob/main/benchmark.rst>`__.
 
 Requirements
 ~~~~~~~~~~~~