Correct Caddyfile formatting

Running 'caddy validate' on included Caddyfile triggered the warning:
Caddyfile input is not formatted;
run 'caddy fmt --overwrite' to fix inconsistencies
{"adapter": "caddyfile", "file": "Caddyfile", "line": 12}

This fix removes the empty line (at line 12) and the validation will
no longer complain.

Fixing https://gitlab.archlinux.org/archlinux/packaging/packages/caddy/-/issues/5

Caddyfile

@@ -9,7 +9,6 @@
 # domain name.
 #
 # https://caddyserver.com/docs/caddyfile/concepts#addresses
-{
 {
 	# Restrict the admin interface to a local unix file socket whose directory
 	# is restricted to caddy:caddy. By default the TCP socket allows arbitrary