Updated docstrings for missing description: fix SA04

pandas-dev Issue pandas-dev#28792

Author: suparnasnair

pandas/core/arrays/interval.py

@@ -820,7 +820,7 @@ def value_counts(self, dropna=True):
 
         See Also
         --------
-        Series.value_counts
+        Series.value_counts: Return a Series containing counts of unique values.
         """
         # TODO: implement this is a non-naive way!
         return value_counts(np.asarray(self), dropna=dropna)