chore(deps): bump hustcer/setup-nu in the actions group (#361)

Bumps the actions group with 1 update: [hustcer/setup-nu](https://github.com/hustcer/setup-nu).


Updates `hustcer/setup-nu` from 3.20 to 3.21
- [Release notes](https://github.com/hustcer/setup-nu/releases)
- [Changelog](https://github.com/hustcer/setup-nu/blob/main/CHANGELOG.md)
- [Commits](hustcer/setup-nu@985d59e...3a97c81)

---
updated-dependencies:
- dependency-name: hustcer/setup-nu
  dependency-version: '3.21'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

action.yml

@@ -242,7 +242,7 @@ runs:
     - name: Setup nu shell
       # I'm done writing everything twice (in bash and powershell)
       # With nu shell, we use the same shell/script for all platforms
-      uses: hustcer/setup-nu@985d59ec83ae3e3418f9d36471cda38b9d8b9879 # v3.20.0
+      uses: hustcer/setup-nu@3a97c8160c2bb5af321a03336e7addc28f94444e # v3.20.0
       with:
         version: '0.106.1'