update deployment workflow to use sudo for luaunit installation

Author: infezek

.github/workflows/deploy.yml

@@ -20,7 +20,7 @@ jobs:
           sudo apt-get install -y luajit luarocks
 
       - name: Install luaunit
-        run: luarocks install luaunit
+        run: sudo luarocks install luaunit
 
       - name: Run LuaJIT tests
         run: luajit ./test/params_test.lua