Backport PR #45633: DOC: Fix typo in nth docstring (#45924)

Co-authored-by: John Zangwill <john@zangwill.net>

Author: meeseeksmachine

pandas/core/groupby/groupby.py

@@ -2643,7 +2643,7 @@ def nth(
             A single nth value for the row or a list of nth values or slices.
 
             .. versionchanged:: 1.4.0
-                Added slice and lists containiing slices.
+                Added slice and lists containing slices.
                 Added index notation.
 
         dropna : {'any', 'all', None}, default None