chore(#3271): CI install CodeFormat from luarocks

Author: alex-courtis

.github/workflows/ci.yml

@@ -48,6 +48,7 @@ jobs:
 
     strategy:
       matrix:
+        lua_version: [ 5.1 ]
         nvim_version: [ stable, nightly ]
         luals_version: [ 3.15.0 ]
         emmyluacodestyle_version: [ 1.5.7 ]
@@ -72,6 +73,11 @@ 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 lua ${{ matrix.lua_version }}
+        uses: leafo/gh-actions-lua@v12
+        with:
+          luaVersion: ${{ matrix.lua_version }}
+
       - name: install luarocks
         uses: leafo/gh-actions-luarocks@v6