Upgrade to Mermaid v8.2.3
Subgraph titles that contain more than one word must now include quotes around them.
This update matches the version used in GitLab 12.1. This update is needed to make https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/31312/diffs work.
Obtained from: https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.2.3/mermaid.min.js
Edited by Stan Hu