Description

Demonstrate that the average phasor coordinates for wider distributions of lifetimes lie further inside the universal semicircle compared to the narrower distributions.

Use gamma distributions for lifetimes.

Make the lifetimes and frequencies used throughout the tutorial more consistent.

Release note

Summarize the changes in the code block below to be included in the
release notes:

Improve phasor_from_lifetime tutorial

Checklist

• The pull request title, summary, and description are concise.
• Related issues are linked in the description.
• New dependencies are explained.
• The source code and documentation can be distributed under the MIT license.
• The source code adheres to code standards.
• New classes, functions, and features are thoroughly tested.
• New, user-facing classes, functions, and features are documented.
• New features are covered in tutorials.
• No files other than source code, documentation, and project settings are added to the repository.