Add extra_args support to install-service justfile command

It's now possible to do: `just install-service prometheus -l host.example.com`

justfile

@@ -15,8 +15,8 @@ lint:
 install-all *extra_args: (run-tags "install-all,ensure-matrix-users-created,start" extra_args)
 
 # Runs installation tasks for a single service
-install-service service:
-	just --justfile {{ justfile() }} run --tags=install-{{ service }},start-group --extra-vars=group={{ service }}
+install-service service *extra_args:
+	just --justfile {{ justfile() }} run --tags=install-{{ service }},start-group --extra-vars=group={{ service }} {{ extra_args }}
 
 # Runs the playbook with --tags=setup-all,ensure-matrix-users-created,start and optional arguments
 setup-all *extra_args: (run-tags "setup-all,ensure-matrix-users-created,start" extra_args)