put setup inside opts

lua/lazyvim/plugins/extras/lang/zig.lua

@@ -30,9 +30,7 @@ return {
     "neovim/nvim-lspconfig",
     opts = {
       servers = {
-        zls = {},
-      },
-    },
+        zls = {
           setup = {
             zls = function(_, opts)
               local zig_tools_opts = require("lazyvim.util").opts("zig-tools.nvim")
@@ -41,6 +39,9 @@ return {
             end,
           },
         },
+      },
+    },
+  },
   {
     "nvim-neotest/neotest",
     optional = true,