Fixed link to aws elastic loadbalancer

[eutopian]

What this PR does / why we need it:
Original Readme link was pointing to a spanish version of the aws site.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

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[eutopian]

/assign @bowei

[antoineco]

/unassign bowei

[antoineco]

/lgtm
Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: antoineco, eutopian

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