Added the PyScripter IDE to the list of "Who is using Ruff?" (#21402)

## Summary

Added the PyScripter IDE to the list of "Who is using Ruff?".

PyScripter is a popular python IDE that is using ruff for code
diagnostics, fixes and code formatting.

Author: pyscripter

README.md

@@ -491,6 +491,7 @@ Ruff is used by a number of major open-source projects and companies, including:
 - [PyTorch](https://github.com/pytorch/pytorch)
 - [Pydantic](https://github.com/pydantic/pydantic)
 - [Pylint](https://github.com/PyCQA/pylint)
+- [PyScripter](https://github.com/pyscripter/pyscripter)
 - [PyVista](https://github.com/pyvista/pyvista)
 - [Reflex](https://github.com/reflex-dev/reflex)
 - [River](https://github.com/online-ml/river)