fix typo

[max8899]

depedencies -> dependencies

/sig multicluster

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[perotinus]

@max8899 Thanks for this PR! However, I believe that the typo that you're fixing is in an upstream project: https://github.com/pwittrock/brodocs/blob/master/README.md

It would probably be better to fix it there, and catch the change in the next update of this repo's docs.

[idealhack]

Closing in favor of https://github.com/Birdrock/brodocs/pull/6

/close