test: put back print statement

Author: juba

tests/ui/tests/notebooks/mix_renderers.ipynb

@@ -15,7 +15,9 @@
     ")\n",
     "\n",
     "opw = Obsplot(\"widget\")\n",
-    "opj = Obsplot(\"jsdom\")"
+    "opj = Obsplot(\"jsdom\")\n",
+    "\n",
+    "print(\"mix\")"
    ]
   },
   {
@@ -99,7 +101,7 @@
   },
   "language_info": {
    "name": "python",
-   "version": "3.10.10"
+   "version": "3.10.12"
   },
   "orig_nbformat": 4
  },