build(deps-dev): bump dset from 3.1.2 to 3.1.4 in /docs

Bumps [dset](https://github.com/lukeed/dset) from 3.1.2 to 3.1.4.
- [Release notes](https://github.com/lukeed/dset/releases)
- [Commits](lukeed/dset@v3.1.2...v3.1.4)

---
updated-dependencies:
- dependency-name: dset
  dependency-type: indirect
...

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