chore(deps): update dependency astro to v5.1.9 (#1301)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [astro](https://astro.build)
([source](https://redirect.github.com/withastro/astro/tree/HEAD/packages/astro))
| [`5.1.8` ->
`5.1.9`](https://renovatebot.com/diffs/npm/astro/5.1.8/5.1.9) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/astro/5.1.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/astro/5.1.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/astro/5.1.8/5.1.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/5.1.8/5.1.9?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>withastro/astro (astro)</summary>

###
[`v5.1.9`](https://redirect.github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#519)

[Compare
Source](https://redirect.github.com/withastro/astro/compare/[email protected]@5.1.9)

##### Patch Changes

-
[#&#8203;12986](https://redirect.github.com/withastro/astro/pull/12986)
[`8911bda`](https://redirect.github.com/withastro/astro/commit/8911bdacabb7fffb82bb3b3628467731ea233187)
Thanks [@&#8203;wetheredge](https://redirect.github.com/wetheredge)! -
Updates types and dev toolbar for ARIA 1.2 attributes and roles

-
[#&#8203;12892](https://redirect.github.com/withastro/astro/pull/12892)
[`8f520f1`](https://redirect.github.com/withastro/astro/commit/8f520f1cc67db51feb966c710e72490a05b88954)
Thanks [@&#8203;louisescher](https://redirect.github.com/louisescher)! -
Adds a more descriptive error when a content collection entry has an
invalid ID.

-
[#&#8203;13031](https://redirect.github.com/withastro/astro/pull/13031)
[`f576519`](https://redirect.github.com/withastro/astro/commit/f5765196e9cd5c582da04ae3bceb4ee1d62b7eae)
Thanks
[@&#8203;florian-lefebvre](https://redirect.github.com/florian-lefebvre)!
- Updates the server islands encoding logic to only escape the script
end tag open delimiter and opening HTML comment syntax

-
[#&#8203;13026](https://redirect.github.com/withastro/astro/pull/13026)
[`1d272f6`](https://redirect.github.com/withastro/astro/commit/1d272f6a5a3af16ad2ab9af41b7193ce67964b69)
Thanks [@&#8203;ascorbic](https://redirect.github.com/ascorbic)! - Fixes
a regression that prevented the import of Markdown files as raw text or
URLs.

</details>

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