Use correct return type for run_command

notebooks/computer_nb.ipynb

@@ -462,7 +462,8 @@
     "dir_exists = await computer.interface.directory_exists(\"/path/to/directory\")\n",
     "\n",
     "# Run shell commands\n",
-    "stdout, stderr = await computer.interface.run_command(\"ls -la\")"
+    "result = await computer.interface.run_command(\"ls -la\")\n",
+    "stdout, stderr, returncode = result.stdout, result.stderr, result.returncode"
    ]
   },
   {
@@ -603,7 +604,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.2"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,