chore: Bump amundsendatabuilder from `7ef5ab6` to `21a763a` (#535)

Bumps [amundsendatabuilder](https://github.com/lyft/amundsendatabuilder) from `7ef5ab6` to `21a763a`.
- [Release notes](https://github.com/lyft/amundsendatabuilder/releases)
- [Commits](https://github.com/lyft/amundsendatabuilder/compare/7ef5ab69bd04061e8aaf375e5b81516f849dd767...21a763add3c00c34b4f4c2d9809f59e50fb264c8)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

amundsendatabuilder @ 21a763ad

-Subproject commit 7ef5ab69bd04061e8aaf375e5b81516f849dd767
+Subproject commit 21a763add3c00c34b4f4c2d9809f59e50fb264c8