Fix typo in available time units doc
Changed yearmonthdatehoursseconds to yearmonthdatehours**minutes**seconds
@@ -13,7 +13,7 @@ These are the available time units:
- ``"year"``, ``"yearquarter"``, ``"yearquartermonth"``, ``"yearmonth"``,
``"yearmonthdate"``, ``"yearmonthdatehours"``, ``"yearmonthdatehoursminutes"``,
- ``"yearmonthdatehoursseconds"``.
+ ``"yearmonthdatehoursminutesseconds"``.
- ``"quarter"``, ``"quartermonth"``
- ``"month"``, ``"monthdate"``
- ``"date"`` (Day of month, i.e., 1 - 31)
