Update instance_segmentation.py to resolve conflict with 2.0.0

[harimkang]

Summary

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have ran e2e tests and there is no issues.
• I have added the description of my changes into CHANGELOG in my target branch (e.g., CHANGELOG in develop).​
• I have updated the documentation in my target branch accordingly (e.g., documentation in develop).
• I have linked related issues.

License

• I submit my code changes under the same Apache License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2024 Intel Corporation
# SPDX-License-Identifier: Apache-2.0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.98%. Comparing base (b3e275e) to head (a2279a6).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3506      +/-   ##
===========================================
- Coverage    75.99%   75.98%   -0.01%     
===========================================
  Files          253      253              
  Lines        24124    24124              
===========================================
- Hits         18332    18331       -1     
- Misses        5792     5793       +1     

Flag	Coverage Δ
py310	75.97% <ø> (+0.03%)	⬆️
py311	75.98% <ø> (+0.10%)	⬆️

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