io/lab: Latex inline block is not correctly rendered

[fabianpatras]

In IO Lab, Remote IO section [1] there is an inline Latex block that is not correctly rendered.
This might be because Docusaurus uses KaTeX for math context [2] which need to be explicitly enabled.

[1] https://open-education-hub.github.io/operating-systems/Lab/IO/remote-io#further-than-ips-ports
[2] https://docusaurus.io/docs/2.1.0/markdown-features/math-equations