Update urwid requirement from <=3.0.5,>=2.6.14 to >=2.6.14,<=4.0.0 (#8229)

* Update urwid requirement from <=3.0.5,>=2.6.14 to >=2.6.14,<=4.0.0

Updates the requirements on [urwid](https://github.com/urwid/urwid) to permit the latest version.
- [Release notes](https://github.com/urwid/urwid/releases)
- [Changelog](https://github.com/urwid/urwid/blob/master/docs/changelog.rst)
- [Commits](https://github.com/urwid/urwid/compare/2.6.14...4.0.0)

---
updated-dependencies:
- dependency-name: urwid
  dependency-version: 4.0.0
  dependency-type: direct:production
...

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