Install i3blocks on Fedora without COPR

[maximiliankolb]

i3blocks is part of the official Fedora repositories; COPR is no longer required.

To verify:

• podman run --rm -it fedora:38
• dnf install i3blocks
• Optional: dnf info i3blocks

[maximiliankolb]

Please let me know if I'll also have to adjust a link in the HTML or if it's built automatically:

$ git grep -i copr
docs/index.html:<p>Fedora (COPR): <a href="https://copr.fedorainfracloud.org/coprs/wyvie/i3blocks">i3blocks</a></p>