Update library/os.po

Co-authored-by: W. H. Wang <mattwang44@gmail.com>

Author: Super1115

library/os.po

@@ -738,7 +738,7 @@ msgstr ""
 #: ../../library/os.rst:571
 msgid "The function is now always available."
 msgstr ""
-"此函式自現在起，永遠可用"
+"此函式現在都會是可用的。"
 
 #: ../../library/os.rst:577
 msgid "Set the current process's effective group id."