Better downloads listings in release notes

[Gankra]

The current impl is a linear table with not-super-useful fields/labels.

In the future when things get more complex it might be nice to have this kind of layout (where the lhs is labels and the rhs is links):

Although I believe markdown tables don't support cell merging, and github strips manual table html :(

This isn't a huge deal because "better UX for downloads listings" is just "use oranda" at the end of the day.

[Aloso]

GitHub allows HTML, but it doesn't allow row and col attributes. You can use nested tables, but it's not pretty though:

Windows	x64 zip, msi symbols arm zip, msi symbols
MacOS	x64 zip, dmg symbols arm zip, dmg symbols
Linux	x64 zip, deb arm zip, deb x64 musl zip, deb

See table HTML

```html

Windows	x64 zip, msi symbols arm zip, msi symbols
MacOS	x64 zip, dmg symbols arm zip, dmg symbols
Linux	x64 zip, deb arm zip, deb x64 musl zip, deb

```

---

Another possibility is to use <details> elements like this:

Windows downloads

x64	zip, msi	symbols
arm	zip, msi	symbols

MacOS downloads

x64	zip, dmg	symbols
arm	zip, dmg	symbols

Linux downloads

x64	zip, deb
arm	zip, deb
x64 musl	zip, deb

I like how uncluttered this looks.