fix: upgrade sanity from 3.18.0 to 3.29.1

Snyk has created this PR to upgrade sanity from 3.18.0 to 3.29.1.

See this package in npm:
https://www.npmjs.com/package/sanity

See this project in Snyk:
https://app.snyk.io/org/ladunjexa/project/3d02fa1e-528e-4801-95ed-5e9ee6f80dac?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot