Fix request_timeout example and doc

[hemslo]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Fix request_timeout example and doc.

Arg name should be _request_timeout, according to Support setting the _request_timeout parameter for the dynamic client.

Single value type should be int or long, otherwise it will be ignored by

python/kubernetes/client/rest.py

Line 145 in 90fc5d6

if isinstance(_request_timeout, (int, ) if six.PY3 else (int, long)): # noqa: E501,F821

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Fix request_timeout example and doc. Arg name should be _request_timeout. Single value type should be int or long.

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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[roycaihw]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hemslo, roycaihw

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