Bump julia-actions/setup-julia from 2.3.0 to 2.4.0 (#120)

Bumps [julia-actions/setup-julia](https://github.com/julia-actions/setup-julia) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/julia-actions/setup-julia/releases)
- [Changelog](https://github.com/julia-actions/setup-julia/blob/master/devdocs/making_a_new_release.md)
- [Commits](780022b48d...512e2ab44f)

---
updated-dependencies:
- dependency-name: julia-actions/setup-julia
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ jobs:
         with:
           path: ./.github/actions/julia-runtest
 
-      - uses: julia-actions/setup-julia@780022b48dfc0c2c6b94cfee6a9284850107d037 # v2.3.0
+      - uses: julia-actions/setup-julia@512e2ab44f5848ea62bddd21d1ee906e989b0360 # v2.4.0
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}