Update dependency katex to v0.16.22 (forgejo) (#7503)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [katex](https://katex.org) ([source](https://github.com/KaTeX/KaTeX)) | dependencies | patch | [`0.16.21` -> `0.16.22`](https://renovatebot.com/diffs/npm/katex/0.16.21/0.16.22) |

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### Release Notes

<details>
<summary>KaTeX/KaTeX (katex)</summary>

### [`v0.16.22`](https://github.com/KaTeX/KaTeX/blob/HEAD/CHANGELOG.md#01622-2025-04-09)

[Compare Source](https://github.com/KaTeX/KaTeX/compare/v0.16.21...v0.16.22)

##### Bug Fixes

- \relax in base or exponent of super/subscript ([#&#8203;4045](https://github.com/KaTeX/KaTeX/issues/4045)) ([1f43c84](https://github.com/KaTeX/KaTeX/commit/1f43c84a175fb689f8c8d1d72b1e8b896a8b43d1))

</details>

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Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7503
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