fixing doc-test: the old value was slightly off, due to fixed sizeof-function

Author: realead

pandas/core/frame.py

@@ -2724,7 +2724,7 @@ def memory_usage(self, index=True, deep=False) -> Series:
         many repeated values.
 
         >>> df['object'].astype('category').memory_usage(deep=True)
-        5216
+        5244
         """
         result = self._constructor_sliced(
             [c.memory_usage(index=False, deep=deep) for col, c in self.items()],