chore(deps): update iwakitakuma/gitlab-mcp docker tag to v2.0.4

Author: renovate[bot]

registry/gitlab/spec.yaml

@@ -6,7 +6,7 @@ tier: Community
 status: Active
 transport: streamable-http
 target_port: 3002
-image: iwakitakuma/gitlab-mcp:2.0.3
+image: iwakitakuma/gitlab-mcp:2.0.4
 repository_url: https://github.com/zereight/gitlab-mcp
 tools:
   - merge_merge_request