nut: Reload systemd after updating container unit

Need to run `systemctl daemon-reload` after creating or modifying the
`nut-server.container` unit file, so that the corresponding service unit
will be generated.

pkg/nut/templates.k

@@ -40,7 +40,10 @@ templates = [
         template = "nut/nut-server.container"
         dest = "/etc/containers/systemd/nut-server.container"
         hooks = {
-            changed = [{run = "systemctl restart nut-server"}]
+            changed = [
+                {run = "systemctl daemon-reload", immediate = True}
+                {run = "systemctl restart nut-server"}
+            ]
         }
     }
 ]