Minor issue in segmentation tutorial

[faizankshaikh]

Description

runner.callbacks["infer"] gives attribute error, should be runner.state.callbacks["infer"]

Might be because of a version change of catalyst

Related Issue

None

Type of Change

• Examples / docs / tutorials / contributors update
• [x ] Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves an existing feature)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x ] I have read the Code of Conduct document.
• [x ] I have read the Contributing guide.
• I have checked the code style using catalyst-check-codestyle (pip install -U catalyst-codestyle).
• I have written tests for all new methods and classes that I created.
• I have written the docstring in Google format for all the methods and classes that I used.
• I have checked the docs using make check-docs.
• I have read I need to click 'Login as guest' to see Teamcity build logs.

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[Scitator]

@faizankshaikh Nice catch, Thank you very much!