Update README.md

[thecodeassassin]

Small typo fix

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[k8s-reviewable]

This change is 

[coveralls]

Coverage increased (+0.03%) to 46.685% when pulling e1ee583 on thecodeassassin:patch-2 into c6b5335 on kubernetes:master.

[aledbf]

/lgtm

[aledbf]

@thecodeassassin thanks!