Updated docstring for MultiIndex.get_level_values (#48756)

The docstring read "maybe casted to", instead of "may be cast to".

Author: llamington

pandas/core/indexes/multi.py

@@ -1729,7 +1729,7 @@ def get_level_values(self, level):
         Index(['d', 'e', 'f'], dtype='object', name='level_2')
 
         If a level contains missing values, the return type of the level
-        maybe casted to ``float``.
+        may be cast to ``float``.
 
         >>> pd.MultiIndex.from_arrays([[1, None, 2], [3, 4, 5]]).dtypes
         level_0    int64