Fix cpu request limit exmaples use the default namespace

[nashasha1]

Specify the namespace to cpu-example. So, users can copy the yaml and run the task directly.

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[tengqm]

this is not necessary since the yaml files are part of the following page:
https://kubernetes.io/docs/tasks/configure-pod-container/assign-cpu-resource/

where each command examples there already explicitly specifies the namespace to use.

[nashasha1]

@tengqm Thanks for your review. But now, users need to specify namespace in every yaml if they want to complete the whole task that is really inconvenient . After pr, people could copy the yaml directly.

[tengqm]

@nashasha1 I wasn't saying this is not correct or unacceptable. I was feeling a trade-off here. You may want to hard code the namespace into a resource manifest for convenience. Next time, when you want to do the same thing in a different namespace, you will need to change the manifest.
So, I'm neutral here.

[nashasha1]

@tengqm Oh I see. thanks for your reply.
I thought the yaml is unique. it belongs to this task. no other places refer it. If users want to use it in other places, they should know replace the namespace.

[nashasha1]

ping @abiogenesis-now

[heckj]

hi @nashasha1 - would you restrict this to the non cn/ content? I would love to have the same content applied to kubernetes/kubernetes-docs-cn. but don't want to mix them within a single PR

/assign

[nashasha1]

@heckj Done. Thanks for your reply.

[heckj]

/lgtm

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