Upgrade librosa version to fix librosa.display.specshow issue in ASR tutorial notebooks

# What does this PR do ?

Matplotlib removed matplotlib.cm.get_cmap 3.9.0 onwards (deprecated since 3.7.0). This causes an error in our ASR tutorials (ASR_for_telephony_speech.ipynb, Speech_Enhancement_with_NeMo.ipynb, Online_Offline_Microphone_VAD_Demo.ipynb) that use librosa.display.specshow, which internally calls matplotlib.cm.get_cmap(name). Librosa fixed it with this PR: [https://github.com/librosa/librosa/pull/1782](https://github.com/librosa/librosa/pull/1782). 
Hence, lower bounding librosa to 0.10.2 in our requirements.txt to account for the above change. 

**Collection**: [Note which collection this PR will affect]
ASR 

# Changelog 
- Add specific line by line info of high level changes in this PR.
Updated requirements file 


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# Additional Information
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