Fix typo

Author: chen2aaron

README.rst

@@ -416,7 +416,7 @@ Projects using memory_profiler
 
 `Benchy <https://github.com/python-recsys/benchy>`_
 
-`IPython memory usage <https://github.com/ianozsvald/ipython_memory_usage_>`_
+`IPython memory usage <https://github.com/ianozsvald/ipython_memory_usage>`_
 
 `PySpeedIT <https://github.com/peter1000/PySpeedIT>`_ (uses a reduced version of memory_profiler)