Added OV import to distil-whisper notebook (openvinotoolkit#2340)

Fix regression after openvinotoolkit#2321

Author: nikita-savelyevv

notebooks/distil-whisper-asr/distil-whisper-asr.ipynb

@@ -1112,6 +1112,7 @@
     "import gc\n",
     "import shutil\n",
     "import nncf\n",
+    "import openvino as ov\n",
     "\n",
     "CALIBRATION_DATASET_SIZE = 50\n",
     "quantized_model_path = Path(f\"{model_path}_quantized\")\n",