deps(deps): bump @types/katex from 0.16.7 to 0.16.8 in the typescript group

Bumps the typescript group with 1 update: [@types/katex](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/katex).

Updates `@types/katex` from 0.16.7 to 0.16.8
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