fix(deps): update dependency katex to v0.16.4

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
katex (source)	0.16.3 -> 0.16.4

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Release Notes

KaTeX/KaTeX

v0.16.4

Compare Source

Bug Fixes

• space should prevent optional argument to \ (#​3746) (a0deb34), closes #​3745

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