Update mermaid version to 8.4.8
This will allow to take advantage of the multi node links syntax released in Mermaid 8.4.5: https://github.com/mermaid-js/mermaid/releases/tag/untagged-f43366252632a1a42020
I wanted to use the multi node links feature in gitlab!29329 (merged) but discovered that the Mermaid version used in gitlab-docs
isn't in sync with gitlab
's.