Fix namespace name in LimitRange section.

[idea7766]

The name of namespace should be one, not limitrange.

[patlaundy]

Nice, I was just about to create a similar PR.
Do you think it makes it clearer if the namespace is limitrange instead of one? So it would require the code examples to be updated rather than the descriptions.

[idea7766]

Actually, I also considered to change name of namespace to limitrange in examples. But it may be misleading if kind and namespace name are the same.