fix docs for proto library re-generation

[avinal]

Changes

• update docs for regenerating proto libraries
• regenerate proto libraries
• fixes #542

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• [x] Has Docs included if any changes are user facing
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Release Notes

NONE

[avinal]

/kind misc

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adambkaplan

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