Git-flow init disregards input for the 'develop' branch

[Vincent van Hoven]

This is an issue I just ran into when using Git-flow from Sourcetree (MacOS on M1). I used Sourcetree on Windows a few months ago, and this issue was not present. I am unsure if this has to do with the OS or with a change in Sourcetree over the past few months.

I initialized a git-flow repository, chose `acceptance` as my development branch, and created a release. Result: it used `develop` as my development branch, creating quite a bit of work to revert that release.

It seems like my input was disregarded.
I will share a short screen capture showcasing the issue.

[Vincent van Hoven]

A short screen capture showcasing the issue:

https://drive.google.com/file/d/1ug-wekD4YPc_Q6_uky3AgLk0L86e-w-I/view?usp=sharing