fix(devcontainer): use bunx for concurrently command (#2723)

Author: Patel230

apps/sim/package.json

@@ -11,7 +11,7 @@
     "dev": "next dev --port 3000",
     "dev:webpack": "next dev --webpack",
     "dev:sockets": "bun run socket/index.ts",
-    "dev:full": "concurrently -n \"App,Realtime\" -c \"cyan,magenta\" \"bun run dev\" \"bun run dev:sockets\"",
+    "dev:full": "bunx concurrently -n \"App,Realtime\" -c \"cyan,magenta\" \"bun run dev\" \"bun run dev:sockets\"",
     "build": "next build",
     "start": "next start",
     "prepare": "cd ../.. && bun husky",