Bug#976189: Catfish not starting anymore after installation of Python 3.9

[Andreas Ronnquist]

I have posted a merge request at 

https://salsa.debian.org/python-team/packages/catfish/-/merge_requests/2

which fixes this.

Please review and merge.

/Andreas Rönnquist
gus...@debian.org
andr...@ronnquist.net