chore(deps): bump next-sanity from 7.1.4 to 9.8.15

Bumps [next-sanity](https://github.com/sanity-io/next-sanity/tree/HEAD/packages/next-sanity) from 7.1.4 to 9.8.15.
- [Release notes](https://github.com/sanity-io/next-sanity/releases)
- [Changelog](https://github.com/sanity-io/next-sanity/blob/main/packages/next-sanity/CHANGELOG.md)
- [Commits](https://github.com/sanity-io/next-sanity/commits/next-sanity-v9.8.15/packages/next-sanity)

---
updated-dependencies:
- dependency-name: next-sanity
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>