DOC: fix typo in timeseries documentation (pandas-dev#15666)

Author: adamjstewart

doc/source/timeseries.rst

@@ -610,7 +610,7 @@ There are several time/date properties that one can access from ``Timestamp`` or
     dayofweek,"The numer of the day of the week with Monday=0, Sunday=6"
     weekday,"The number of the day of the week with Monday=0, Sunday=6"
     weekday_name,"The name of the day in a week (ex: Friday)"
-    quarter,"Quarter of the date: Jan=Mar = 1, Apr-Jun = 2, etc."
+    quarter,"Quarter of the date: Jan-Mar = 1, Apr-Jun = 2, etc."
     days_in_month,"The number of days in the month of the datetime"
     is_month_start,"Logical indicating if first day of month (defined by frequency)"
     is_month_end,"Logical indicating if last day of month (defined by frequency)"