983 testing notebook (#985)

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

Fixes #983


### Checks
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- [ ] Notebook runs automatically `./runner [-p <regex_pattern>]`

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

Author: wyli

modules/interpretability/covid_classification.ipynb

@@ -18,7 +18,7 @@
     "\n",
     "We explore some of MONAI's interpretability classes:\n",
     "- `OcclusionSensitivity`,\n",
-    "- `GradCAM++`,\n",
+    "- `GradCAM++`.\n",
     "\n",
     "For brevity, we don't bother with splitting into training and validation datasets.\n",
     "\n",
@@ -1234,7 +1234,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.13"
+   "version": "3.8.12"
   }
  },
  "nbformat": 4,

requirements.txt

@@ -3,4 +3,5 @@ papermill
 autopep8
 jupytext
 autoflake
+ipywidgets
 tensorboard>=2.4.0