• Update to 3.1.2
• Change portname to py-frescobaldi to comply with Python Ports Policy
• Make portclippy happy

PR: 242939
Submitted by: m.ne@gmx.net (maintainer)
Approved by: ehaupt (mentor)
Changelog: https://github.com/frescobaldi/frescobaldi/blob/v3.1.2/ChangeLog