Place "Congratulations ..." comment also on GitLab

Signed-off-by: Frantisek Lachman <flachman@redhat.com>

packit_service/worker/handlers/fedmsg_handlers.py

@@ -28,6 +28,7 @@
 from datetime import datetime
 from typing import Type, Optional
 
+from ansible.modules.source_control.gitlab_project import GitLabProject
 from celery import signature
 
 from ogr.abstract import CommitStatus
@@ -269,7 +270,7 @@ def run(self):
             build_job_helper.job_build
             and build_job_helper.job_build.trigger == JobConfigTriggerType.pull_request
             and self.copr_event.pr_id
-            and isinstance(self.project, GithubProject)
+            and isinstance(self.project, (GithubProject, GitLabProject))
             and not self.was_last_packit_comment_with_congratulation()
             and self.job_config.notifications.pull_request.successful_build
         ):