Bump highlight.js from 9.18.1 to 9.18.5 in /lib/mermaid#4

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dependabot/npm_and_yarn/lib/mermaid/highlight.js-9.18.5CeejayChen/SocChen.github.io:dependabot/npm_and_yarn/lib/mermaid/highlight.js-9.18.5Copy head branch name to clipboard