Update diagnostics.po

Author: lovesnow1314

locale/zh/LC_MESSAGES/faq/diagnostics.po

@@ -94,7 +94,7 @@ msgid ""
 "value, or see your operating system's documentation for setting the TCP "
 "keepalive value persistently."
 msgstr ""
-""新设定的 ``tcp_keepalive_time`` 的值生效不需要你重新启动:program:`mongod` "
+"新设定的 ``tcp_keepalive_time`` 的值生效不需要你重新启动:program:`mongod` "
 "或 :program:`mongos` 服务. 当你重启系统后，你需要重新设定``tcp_keepalive_time`` "
 "的值，或者通过查看你的操作系统文档来永久的设定TCP keepalive值。""