fixup: Use specific Nerd Font release

[Finii]

[why]
When Nerd Font evolves and new commits become pulled to master our
scripts might break.

See also warning at
https://github.com/ryanoasis/nerd-fonts#unstable-file-paths

This is the case here, because Nerd Fonts decided to rename Cascadia
when it patches it. Our subsequent renaming then failes.

[how]
Reference release v2.1.0 as this is master at the moment.
Adapt to new output file name.

[adam7]

@Finii I'm guessing #28 supersedes this and makes it unnecessary, also you should now have collaborator permissions :)

[Finii]

Yes, I wanted to base #28 not on master but on the branch of this PR. To disentangle both commits as good as possible (*).
But then, of course, I could not create a branch for #27 in this repo to base #28 on it, so...

(*): Because for me #27 fixes a bug so it can/should be pulled always. But #28 is kind of a management decision, shall Delugia include more glyphs than usual Nerd Font fonts. So this is not so clear that it will be accepted by you.

Sorry for lengthy explanation :-)

Closing this because the commit is already in master.

[Finii]

And btw, thank you for collaborator rights. :)

I'm not too familiar with github and tried to send you a PM asking what your intention is with the rights, but then I had to work on some other repos and fix stuff at work (where I use pure command-line git and sometimes Stash) and got sidetracked.

So with the rights I would have merged this PR (fix). But I would have left the decision to include #28 to you. I could do the manual labor, but maybe not the decisions. Maybe you want to give me some guidance of what you expect :-)

Fini

[adam7]

You're welcome on collaborator rights, sorry for not being more reactive to your comments. You've repeatedly shown that you're a super helpful and dilligent contributor so I wanted to give you more freedom without me being a bottleneck.
Delugia was really just an excuse for me to experiment with github actions and an interesting problem. It turned out to be more popular than I expected and you've kept it fresh and alive and fixed issues that I completely lacked time or expertise for, thanks for that :)