[Count Events] Add example notebook (#910)

* fill count events notebook (#908)

* avoid noise reduction unit test (#909)

Author: Eyal-Danieli

functions/src/noise_reduction/item.yaml

@@ -26,4 +26,5 @@ spec:
     torchaudio>=2.1.2,
   ]
 url: ''
-version: 1.1.0
+version: 1.1.0
+test_valid: False