Question on how to use custom actions
Sorry, I feel like this a very silly question but I am struggling with the new custom actions, I just want to set .md files to be opened with nvim. 
```
[General]
taskbin=task
taskargs
no_annotation_hook="addnote $ID"
task_attributes="priority,project,tags,description"
--sort:"urgency-,annot"
--active-tasks:"+PENDING"
path_ext=/usr/share/taskopen/scripts

[Actions]
notes.regex = "(N|n)otes?"
notes.command = "$EDITOR $HOME/tasknotes/$UUID.txt"
markdown.target = annotations
markdown.regex = ".*md"
markdown.labelregex = ".*"
markdown.command = "nvim $FILE"
markdown.modes = normal,any,batch
markdown.filtercommand = ""
markdown.inlinecommand = ""
```
The notes action is working fine, but anything else is being picked up as files: for instance, the result of a ``taskopen 36 --debug`` on a file with many annotations is 
```
 1) files: /home/lchiarini/Desktop/2022-06-20-Note-17-50.xopp
    ("Example") -- 36
 2) files: /home/lchiarini/Desktop/test.md
    ("Example") -- 36
 3) notes: note
    ("Example") -- 36
```
I don't understand why the second one is being taken as files rather than markdown. Did I misunderstand the way of declaring new custom actions?
