Move location manual from section 8 to section 1 in location-update.service

It's a tool a non-superuser can use. It's installed into /usr/bin.
Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

src/systemd/location-update.service.in

 [Unit]
 Description=Automatic Location Database Updater
-Documentation=man:location(8) https://man-pages.ipfire.org/libloc/location.html
+Documentation=man:location(1) https://man-pages.ipfire.org/libloc/location.html
 Requires=network.target
 
 [Service]