Xdhcp: fix example configuration
Xdhcp: fix example configuration

The current cni config has an extra comma and cannot be parsed normally, the kubelet will report an error as follows:
"Error loading CNI config file: error parsing configuration: invalid character '}' looking for beginning of object key string"

Signed-off-by: xieyanker <4dfec9ddd4b6db7210b907af21791819ba346b49@gmail.com>

containernetworking/plugins,containernetworking/plugins