Replace asset url

url was pointing to the data in github repo which had a cors issue.

Author: ovalle15

examples/annotation_import/image.ipynb

@@ -533,7 +533,7 @@
         "\n",
         "\n",
         "test_img_url = {\n",
-        "    \"row_data\": \"https://raw.githubusercontent.com/Labelbox/labelbox-python/develop/examples/assets/2560px-Kitano_Street_Kobe01s5s4110.jpg\",\n",
+        "    \"row_data\": \"https://storage.googleapis.com/labelbox-datasets/image_sample_data/2560px-Kitano_Street_Kobe01s5s4110.jpeg\",\n",
         "    \"global_key\": str(uuid.uuid4())\n",
         "}\n",
         "  \n",