Fix broken master by updating expected params

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/24296
introduced a spec that interacted badly with a schema change to the
`services` table in 8d4d9705.

`update_service_spec.rb` expected certain attributes, some of which
are based on default properties of a `PrometheusService`, which is a
model that reads from `services`.

8d4d9705 changed the schema of `services` which caused the test to
break.

https://gitlab.com/gitlab-org/gitlab/issues/205391

spec/services/projects/operations/update_service_spec.rb

@@ -304,7 +304,6 @@ describe Projects::Operations::UpdateService do
             "title" => nil,
             "active" => true,
             "properties" => { "api_url" => "http://example.prometheus.com", "manual_configuration" => "0" },
-            "instance" => false,
             "push_events" => true,
             "issues_events" => true,
             "merge_requests_events" => true,
@@ -320,7 +319,8 @@ describe Projects::Operations::UpdateService do
             "confidential_note_events" => true,
             "deployment_events" => false,
             "description" => nil,
-            "comment_on_event_enabled" => true
+            "comment_on_event_enabled" => true,
+            "template" => false
           }
         end
         let(:params) do