build(deps): bump @vueuse/core in /build/frontend-legacy

Bumps [@vueuse/core](https://github.com/vueuse/vueuse/tree/HEAD/packages/core) from 11.3.0 to 13.9.0.
- [Release notes](https://github.com/vueuse/vueuse/releases)
- [Commits](https://github.com/vueuse/vueuse/commits/v13.9.0/packages/core)

---
updated-dependencies:
- dependency-name: "@vueuse/core"
  dependency-version: 13.9.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]