chore(deps): bump leafo/gh-actions-luarocks from 4 to 5 (#240)

Bumps [leafo/gh-actions-luarocks](https://github.com/leafo/gh-actions-luarocks) from 4 to 5.
- [Release notes](https://github.com/leafo/gh-actions-luarocks/releases)
- [Commits](leafo/gh-actions-luarocks@v4...v5)

---
updated-dependencies:
- dependency-name: leafo/gh-actions-luarocks
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -38,6 +38,6 @@ jobs:
       - uses: leafo/gh-actions-lua@v10
         with:
           luaVersion: "5.1.5"
-      - uses: leafo/gh-actions-luarocks@v4
+      - uses: leafo/gh-actions-luarocks@v5
       - name: Run nvim-test tests
         run: nix shell nixpkgs#bash nixpkgs#just -c just test ${{ matrix.nvim-version }}