Escape curly braces for go-template

[gunyarakun]

$ curl http://$(kubectl get pod nginx -o go-template=

should be

$ curl http://$(kubectl get pod nginx -o go-template={{.status.podIP}})

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[gunyarakun]

I signed it!

[googlebot]

CLAs look good, thanks!

[johndmulhausen]

Thanks, but #349 handled this already.