📖 Simplify event recording example

[rkosegi]

There is no need for fmt.Sprintf since EventRecorder already has Eventf method that accepts formatting string

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[camilamacedo86]

Thank you for the contribution 🥇

/lgtm
/approved
/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: camilamacedo86, rkosegi

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