chore: bump flat-cache in the root-dependencies group

Bumps the root-dependencies group with 1 update: [flat-cache](https://github.com/jaredwray/cacheable/tree/HEAD/packages/flat-cache).


Updates `flat-cache` from 6.1.1 to 6.1.2
- [Release notes](https://github.com/jaredwray/cacheable/releases)
- [Commits](https://github.com/jaredwray/cacheable/commits/HEAD/packages/flat-cache)

---
updated-dependencies:
- dependency-name: flat-cache
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: root-dependencies
...

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