Update screenshot.sh

[erhaver]

Fixed issue where 'Screenshot Aborted' message was displayed when taking a window screenshot due to a semicolon at the end of the command.

[fdev31]

I have the same issue, but this fix doesn't work for me, I think it has no impact.
The problem seems to be that hyprshot may return while the file isn't visible on disk yet...

I tried with just a sync call but it didn't work reliably, I had to add a sleep 0.1 before it, just before the test -f $full_path