Update documents to compatible jekyll-rtd-theme

docs/getting-started/n00b-advanced.md

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+---
+sort: 7
+title: Advanced usage
+---
+
+# Advanced n00b mermaid (Coming soon..)
+
+## splitting mermaid code from html
+A more condensed html code can be achieved by embedding the mermaid code in its own .js file, which is referenced like so:
+
+```
+stuff stuff
+  </div>
+  </body>
+</html>
+```
+The actual mermaid file could for example look like this:
+
+```
+mermaid content...
+```
+---
+
+## mermaid configuration options
+
+...