Apply suggestions from code review

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

Author: mattwang44

howto/ipaddress.po

@@ -200,7 +200,7 @@ msgid ""
 "commonly used to describe network interfaces of a computer on a given "
 "network and are described further in the next section."
 msgstr ""
-"網路物件不能設定任何主機位元。這樣做的實際效果是 192.0.2.1/24 並不描述一個網"
+"網路物件不能設定任何主機位元。這樣做的實際效果是 ``192.0.2.1/24`` 並不描述一個網"
 "路。這類定義被稱為介面物件，因為 ip-on-a-network 標記法通常用於描述電腦在給定"
 "網路上的網路介面，並將在下一節中進一步說明。"