Update zed.smd (#10)

Author: kofta999

content/zls/editors/zed.smd

@@ -24,6 +24,8 @@ Add the following to your `settings.json`:
       // The Zig FAQ answers some questions about `zig fmt`:
       // https://github.com/ziglang/zig/wiki/FAQ
       "format_on_save": "language_server",
+      // Make sure that zls is the primary language server
+      "language_servers": ["zls", "..."]
       "code_actions_on_format": {
         // Run code actions that currently supports adding and removing discards.
         // "source.fixAll": true,