chore(deps): bump leafo/gh-actions-luarocks from 5 to 6 (#247)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -38,6 +38,6 @@ jobs:
       - uses: leafo/gh-actions-lua@v12
         with:
           luaVersion: "5.1.5"
-      - uses: leafo/gh-actions-luarocks@v5
+      - uses: leafo/gh-actions-luarocks@v6
       - name: Run nvim-test tests
         run: nix shell nixpkgs#bash nixpkgs#just -c just test ${{ matrix.nvim-version }}