devel/py-ttkbootstrap: Update to 2.1.1

ChangeLog:

• https://github.com/israel-dryer/ttkbootstrap/releases#release-v1.20.4
• https://github.com/israel-dryer/ttkbootstrap/releases#release-v2.0.0
• https://github.com/israel-dryer/ttkbootstrap/releases#release-v2.0.1
• https://github.com/israel-dryer/ttkbootstrap/releases#release-v2.1.1

Reported by: Israel Dryer <notifications@github.com>