Update library/string.po

翻譯positional-only

Co-authored-by: RockLeon <34214497+rockleona@users.noreply.github.com>

Author: marychiou

library/string.po

@@ -140,7 +140,7 @@ msgstr ""
 msgid ""
 "A format string argument is now :ref:`positional-only <positional-"
 "only_parameter>`."
-msgstr "現在格式字串引數是 :ref:`positional-only <positional-only_parameter>`。"
+msgstr "現在格式字串引數是\\ :ref:`僅限位置參數 <positional-only_parameter>`。"
 
 #: ../../library/string.rst:104
 msgid ""