Update automated release workflow

[Joshua-Dickens]

Cleaned up checksum generation, got rid of old soon to be deprecated set_output styling for the new styling recommended by github, and small formatting changes that should make the autogenerated release text cleaner.

[whot]

@Joshua-Dickens can you fix your editor please so git commit messages don't exceed 78 characters? I think that's a requirement for most projects anyway (and it improves readability).

other than that, this LGTM, thanks!

[whot]

the checkpatch job should be taught to ignore commits that don't touch the kernel directories...

[Joshua-Dickens]

@whot
Fixed my editor, don't know why I haven't done it before since it'll help with me forgetting commit formatting. As for the checkpatch that's something we can look into, I took a quick peek at the config options for the action we're using and I don't see anything in there that might help with that so we'll have to add some logic to the workflow itself. Something I can look into knocking out.

[whot]

quick google found this link - since we have checkpatch as a separate workflow already it seems like it's just a matter of adding paths to the top-level on

[Joshua-Dickens]

Yeah that seems like it would do the trick.
Went ahead and rewrote the commit message to make it a bit cleaner and with that this merge should be good.