Format prettier_server.js (#9583)

This PURELY formats the file by opening it in Zed and hitting save with
save-on-format on.

It's been bugging me that I can't change the file without the whole
thing getting reformatted, so here we are.

Release Notes:

- N/A

.zed/settings.json

@@ -15,6 +15,10 @@
     "JSON": {
       "tab_size": 2,
       "formatter": "prettier"
+    },
+    "JavaScript": {
+      "tab_size": 2,
+      "formatter": "prettier"
     }
   },
   "formatter": "auto"