Update aboutqudidialog.py

[christoph-mueller]

Added a tab in aboutqudidialog.py with information about how to cite Qudi

Description

Added a tab in aboutqudidialog.py with information about how to cite Qudi

Motivation and Context

it's nice if one has all the information to cite Qudi directly

How Has This Been Tested?

opened the dialog window

Screenshots (only if appropriate, delete if not):

Types of changes

• [ ] Bug fix
• [x ] New feature
• [ ] Breaking change (Causes existing functionality to not work as expected)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] I have documented my changes in /docs/changelog.md.
• [ ] My change requires additional/updated documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added/updated the config example for any module docstrings as necessary.
• [ ] I have checked that the change does not contain obvious errors (syntax, indentation, mutable default values, etc.).
• [ ] I have tested my changes using 'Load all modules' on the default dummy configuration.
• [ ] All changed Jupyter notebooks have been stripped of their output cells.