fix: translation of missing 旗標

Author: xchux

library/asyncio-eventloop.po

@@ -1197,7 +1197,7 @@ msgid ""
 "flag when being created. This option is not supported on Windows."
 msgstr ""
 "*reuse_port* 告訴內核允許此端點繫結到與其他現有端點繫結的相同埠，只要它們在建"
-"立時都設置了此。此選項在旗標 Windows 上不受支援。"
+"立時都設置了此旗標。此選項在旗標 Windows 上不受支援。"
 
 #: ../../library/asyncio-eventloop.rst:738
 msgid ""