chapter07: Translate comment in code block of symlinks page (#3)

chapter07/symlinks.xml

@@ -318,7 +318,7 @@
 
 <screen role="nodump"><userinput>cat &gt; /etc/udev/rules.d/83-duplicate_devs.rules &lt;&lt; "EOF"
 <literal>
-# Persistent symlinks for webcam and tuner
+# 摄像头和电视棒的持久化符号链接
 KERNEL=="video*", ATTRS{idProduct}=="1910", ATTRS{idVendor}=="0d81", \
     SYMLINK+="webcam"
 KERNEL=="video*", ATTRS{device}=="0x036f", ATTRS{vendor}=="0x109e", \