chore(deps): update dependency katex to v0.16.28

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
katex (source)	0.16.20 → 0.16.28

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Release Notes

KaTeX/KaTeX (katex)

v0.16.28

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Bug Fixes

• type: add missing types definition path to package.json (#​4125) (0ef8921)

v0.16.27

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Features

• support equals sign and surrounding whitespace in \htmlData attribute values (#​4112) (c77aaec)

v0.16.26

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Bug Fixes

• \mathop followed by integral symbol (6fbad18)

v0.16.25

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Features

• css: provide katex-swap.css that uses font-display: swap (#​3940) (b3f9ce6), closes #​2242

v0.16.24

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Features

• support hex colors with alpha (#​4090) (8c9b306), closes #​4067 #fA6 #fA6f1

v0.16.23

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Bug Fixes

• Support \def with arguments via macros option (#​4087) (80a8158)

v0.16.22

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Bug Fixes

• \relax in base or exponent of super/subscript (#​4045) (1f43c84)

v0.16.21

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Bug Fixes

• escape \htmlData attribute name (57914ad)

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