Translated the weekday sentence (#534)

* Translated the weekday sentence

* Modified the error

* Update library/datetime.po

---------

Co-authored-by: 李逸帆 <[email protected]>
Co-authored-by: Wei-Hsiang (Matt) Wang <[email protected]>

Author: 3 people

library/datetime.po

@@ -935,6 +935,8 @@ msgid ""
 "For example, ``date(2002, 12, 4).weekday() == 2``, a Wednesday. See also :"
 "meth:`isoweekday`."
 msgstr ""
+"回傳一個代表星期幾的整數，星期一為 0、星期日為 6。"
+"例如 ``date(2002, 12, 4).weekday() == 2`` 為星期三。也請參考 :meth:`isoweekday`。"
 
 #: ../../library/datetime.rst:678
 msgid ""