Update dependency katex to v0.16.11

This MR contains the following updates:

Package	Type	Update	Change
katex (source)	dependencies	patch	0.16.10 -> 0.16.11

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Release Notes

KaTeX/KaTeX (katex)

v0.16.11

Compare Source

Features

• add \emph (#​3963) (9f34da4), closes #​3566

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