Update dependency typedoc-plugin-markdown to v4.6.3 (#1251)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [typedoc-plugin-markdown](https://typedoc-plugin-markdown.org)
([source](https://redirect.github.com/typedoc2md/typedoc-plugin-markdown/tree/HEAD/packages/typedoc-plugin-markdown))
| [`4.6.2` ->
`4.6.3`](https://renovatebot.com/diffs/npm/typedoc-plugin-markdown/4.6.2/4.6.3)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/typedoc-plugin-markdown/4.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/typedoc-plugin-markdown/4.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/typedoc-plugin-markdown/4.6.2/4.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/typedoc-plugin-markdown/4.6.2/4.6.3?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>typedoc2md/typedoc-plugin-markdown
(typedoc-plugin-markdown)</summary>

###
[`v4.6.3`](https://redirect.github.com/typedoc2md/typedoc-plugin-markdown/blob/HEAD/packages/typedoc-plugin-markdown/CHANGELOG.md#463-2025-04-23)

[Compare
Source](https://redirect.github.com/typedoc2md/typedoc-plugin-markdown/compare/[email protected]@4.6.3)

##### Patch Changes

- Correctly handle group title in pageTitleTemplates callback
([#&#8203;807](https://redirect.github.com/typedoc2md/typedoc-plugin-markdown/issues/807)).
- Format of optional type and getter/setter
([#&#8203;804](https://redirect.github.com/typedoc2md/typedoc-plugin-markdown/issues/804))
- thanks [@&#8203;normanzb](https://redirect.github.com/normanzb).

</details>

---

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