Add bug fixed to what's new

Author: Dr-Irv

doc/source/whatsnew/v0.17.1.txt

@@ -90,3 +90,5 @@ Bug Fixes
 - Bugs in ``to_excel`` with duplicate columns (:issue:`11007`, :issue:`10982`, :issue:`10970`)
 - Fixed a bug that prevented the construction of an empty series of dtype
   ``datetime64[ns, tz]`` (:issue:`11245`).
+
+- Bug in ``read_excel`` with multi-index containing integers (:issue:`11317`, :issue:`11328`)