Change example of tagTemplate in config-network to the same value of default (#6186)
Change example of tagTemplate in config-network to the same value of default (#6186)

As https://github.com/knative/serving/issues/6178 reported, the
default value of tagTemplate is:

https://github.com/knative/serving/blob/b8a17ae4bac00a9749ba65b822db697cd582df50/pkg/network/network.go#L119

which is opposite from the example in `config-network`. As discussed
in https://github.com/knative/serving/issues/3492, the example value
should be defaults to avoid confusion.
knative/serving,knative/serving