Confidence fix for tutorial (NVIDIA-NeMo#14250)

Signed-off-by: Nune <ntadevosyan@nvidia.com>

Author: nune-tadevosyan

tutorials/asr/ASR_Confidence_Estimation.ipynb

@@ -1354,7 +1354,8 @@
     "\n",
     "# e\n",
     "max_fnr = 0.01\n",
-    "\n",
+    "# Adding a check for cases with apostrophes\n",
+    "transcriptions = [h for h in transcriptions if len(h.word_confidence)==len(h.text.split())]\n",
     "correct_marks = [\n",
     "    mark for r, h in zip(current_test_set.reference_texts, transcriptions) for mark in get_correct_marks(r.split(), h.words)\n",
     "]\n",