fix: linux service should restart when upgrading (#5001)

* When upgrading packages this should restart the service

* We need to specify configfile otherwise this command doesn't work

release/linux/postinstall.sh

@@ -23,6 +23,8 @@ if [ ! -f "$postinstall_flag" ]; then
     # and not by root
     chown navidrome:navidrome /var/lib/navidrome/cache
     touch "$postinstall_flag"
+else
+    navidrome service stop --configfile /etc/navidrome/navidrome.toml && navidrome service start --configfile /etc/navidrome/navidrome.toml
 fi