Keep capitalization on task groups

[nylnx]

If you group tasks with a group separator, all the groups are converted to lowercase. I don't think it should be that way. I would much rather prefer it to keep the capitalization as it is per default. I mainly use this extension with VSCode tasks from a tasks.json and it's just a bit ugly to only have lowercase.

Maybe there is a good reason for this, which I don't see with my particular use case, but I would be happy to know more about the reasoning or the possibility to change this.

Thank you anyway for such a great extension!