ci: action downloads and installs luals

.github/workflows/ci.yml

@@ -45,9 +45,18 @@ jobs:
 
   check:
     runs-on: ubuntu-latest
+
+    env:
+      LUALS_VERSION: 3.7.3
+
     steps:
     - uses: actions/checkout@v3
 
+    - name: install
+      run: |
+        mkdir -p luals
+        curl -L "https://github.com/LuaLS/lua-language-server/releases/download/${LUALS_VERSION}/lua-language-server-${LUALS_VERSION}-linux-x64.tar.gz" | tar zx --directory luals
+
     - name: lua-language-server --check
       run: |
-        scripts/luals-check
+        PATH="luals/bin:${PATH}" scripts/luals-check