Remove monolithic provider from updoc workflow

[turkenf]

Description of your changes

This PR removes monolithic pack form updoc.

I have:

• [x] Read and followed Crossplane's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [x] Added backport release-x.y labels to auto-backport this PR if necessary.

[github-actions[bot]]

Successfully created backport PR #544 for release-1.3.