Update task_adherence.ipynb

[singankit]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

If an SDK is being regenerated based on a new swagger spec, a link to the pull request containing these swagger spec changes has been included above.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull Request Overview

This pull request updates the sample notebook to reflect the use of the Task Adherence Evaluator instead of the previously referenced Intent Resolution Evaluator.

• Updated the description text in the notebook sample.
• Ensured that the sample installation instructions remain consistent with the updated evaluator.

[azure-sdk]

API change check

API changes are not detected in this pull request.