Bump @vercel/build-utils from 7.1.0 to 7.7.0

Bumps [@vercel/build-utils](https://github.com/vercel/vercel/tree/HEAD/packages/now-build-utils) from 7.1.0 to 7.7.0.
- [Release notes](https://github.com/vercel/vercel/releases)
- [Commits](https://github.com/vercel/vercel/commits/@vercel/[email protected]/packages/now-build-utils)

---
updated-dependencies:
- dependency-name: "@vercel/build-utils"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>