1510 fixes downloading url (#1511)

Fixes #1510



### Checks
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Avoid including large-size files in the PR.
- [x] Clean up long text outputs from code cells in the notebook.
- [x] For security purposes, please check the contents and remove any
sensitive info such as user names and private key.
- [x] Ensure (1) hyperlinks and markdown anchors are working (2) use
relative paths for tutorial repo files (3) put figure and graphs in the
`./figure` folder
- [x] Notebook runs automatically `./runner.sh -t <path to .ipynb file>`

Signed-off-by: Wenqi Li <wenqil@nvidia.com>

Author: wyli

modules/transforms_demo_2d.ipynb

@@ -188,9 +188,14 @@
    ],
    "source": [
     "resource = (\n",
-    "    \"https://warwick.ac.uk/fac/sci/dcs/research/tia/\"\n",
-    "    + \"glascontest/download/warwick_qu_dataset_released_2016_07_08.zip\"\n",
+    "    \"https://github.com/Project-MONAI/MONAI-extra-test-data/releases/download/0.8.1/\"\n",
+    "    + \"warwick_qu_dataset_released_2016_07_08.zip\"\n",
     ")\n",
+    "# original source:\n",
+    "# resource = (\n",
+    "#     \"https://warwick.ac.uk/fac/sci/dcs/research/tia/\"\n",
+    "#     + \"glascontest/download/warwick_qu_dataset_released_2016_07_08.zip\"\n",
+    "# )\n",
     "md5 = None\n",
     "\n",
     "compressed_file = os.path.join(root_dir, \"warwick_qu_dataset_released_2016_07_08.zip\")\n",
@@ -436,7 +441,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.13"
+   "version": "3.9.16"
   }
  },
  "nbformat": 4,