Add missing import in transcribe_utils.py

[jonghwanhyeon]

What does this PR do ?

Add a one line overview of what this PR aims to accomplish.

Collection: ASR

Changelog

• Add missing import model_utils in nemo/collections/asr/parts/utils/transcribe_utils.py
  • When I use examples/asr/transcribe_speech.py, the following error has been occurred:

Traceback (most recent call last):
  File "/workspace/NeMo/examples/asr/transcribe_speech.py", line 146, in main
    asr_model, model_name = setup_model(cfg, map_location)
  File "/workspace/NeMo/nemo/collections/asr/parts/utils/transcribe_utils.py", line 184, in setup_model
    imported_class = model_utils.import_class_by_path(classpath)  # type: ASRModel
NameError: name 'model_utils' is not defined

Usage

• You can potentially add a usage example below

# Add a code snippet demonstrating how to use this 

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PR Type:

• New Feature
• Bugfix
• Documentation

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Additional Information

• Related to # (issue)