DOC: add whatsnew entry for bug GH pandas-dev#14580 fix

Author: nathalier

doc/source/whatsnew/v0.19.2.txt

@@ -94,3 +94,5 @@ Bug Fixes
 - Bug in ``.plot(kind='kde')`` which did not drop missing values to generate the KDE Plot, instead generating an empty plot. (:issue:`14821`)
 
 - Bug in ``unstack()`` if called with a list of column(s) as an argument, regardless of the dtypes of all columns, they get coerced to ``object`` (:issue:`11847`)
+
+- Bug in ``pd.Series`` iloc returned Categorical object for list-like indexes input, while Series object was expected. (:issue:`14580`)