Changing existing priority breaks with more than three priorities

[seflue]

Describe the bug

When I define more priorities then just "highest", "lowest" and "default", then the "intermediate" priority is not recognized as priority when changing an existing priority and a new one is added to the headline.

Steps to reproduce

1. Define more sophisticated priorities in config, like:

   -- ...
   org_priority_highest = 'A',
   org_priority_default = 'C',
   org_priority_lowest = 'E',
   -- ...

2. Create a headline with no priority.
3. Cycle with "Increase priority of headline" through the priorities

Expected behavior

The headline priority should change from [#E] over [#D], [#C], [#B] to [#A] and then nothing again.

Emacs functionality

Bug doesn't exist in Emacs org mode. Priorities are explained here.

Minimal init.lua

...

Screenshots and recordings

No response

OS / Distro

Linux, as always

Neovim version/commit

0.10

Additional context

I already fixed the bug, PR is in the making.