chore(#3271): CI install CodeFormat from luarocks

Author: alex-courtis

.github/workflows/ci.yml

@@ -72,6 +72,9 @@ jobs:
           curl -L "https://github.com/LuaLS/lua-language-server/releases/download/${{ matrix.luals_version }}/lua-language-server-${{ matrix.luals_version }}-linux-x64.tar.gz" | tar zx --directory luals
           echo "luals/bin" >> "$GITHUB_PATH"
 
+      - name: install luarocks
+        uses: leafo/gh-actions-luarocks@v6
+
       - name: install emmyluacodestyle ${{ matrix.emmyluacodestyle_version }}
         run: luarocks install emmyluacodestyle ${{ matrix.emmyluacodestyle_version }}