Update dependency typedoc to v0.28.8 (#1347)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [typedoc](https://typedoc.org)
([source](https://redirect.github.com/TypeStrong/TypeDoc)) | [`0.28.7`
-> `0.28.8`](https://renovatebot.com/diffs/npm/typedoc/0.28.7/0.28.8) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/typedoc/0.28.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/typedoc/0.28.7/0.28.8?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>TypeStrong/TypeDoc (typedoc)</summary>

###
[`v0.28.8`](https://redirect.github.com/TypeStrong/TypeDoc/blob/HEAD/CHANGELOG.md#v0288-2025-07-28)

[Compare
Source](https://redirect.github.com/TypeStrong/TypeDoc/compare/v0.28.7...v0.28.8)

##### Features

- If using JS config files, the `plugin` function can now be given
plugin functions to load.
- Permit `-` within tag names to support `typescript-json-schema`'s
`@TJS-type` tag,
[#&#8203;2972](https://redirect.github.com/TypeStrong/TypeDoc/issues/2972).
- Exposed `Context.createSymbolId` for use by plugins.

##### Bug Fixes

- Relative links in `<img srcset>` will now be discovered by TypeDoc,
[#&#8203;2975](https://redirect.github.com/TypeStrong/TypeDoc/issues/2975).
- Relative links in `<source src>` and `<source srcset>` elements will
now be discovered by TypeDoc,
[#&#8203;2975](https://redirect.github.com/TypeStrong/TypeDoc/issues/2975).
- Improved inherited from/overwrites link discovery to point to parent
properties in more cases,
[#&#8203;2978](https://redirect.github.com/TypeStrong/TypeDoc/issues/2978)

##### Thanks!

- [@&#8203;jonathanhefner](https://redirect.github.com/jonathanhefner)
- [@&#8203;laymonage](https://redirect.github.com/laymonage)

</details>

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