chore(deps): update dependency astro to v4.15.11 (#1212)

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))
| [`4.15.10` ->
`4.15.11`](https://renovatebot.com/diffs/npm/astro/4.15.10/4.15.11) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/astro/4.15.11?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/astro/4.15.11?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/astro/4.15.10/4.15.11?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/4.15.10/4.15.11?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

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

###
[`v4.15.11`](https://redirect.github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#41511)

[Compare
Source](https://redirect.github.com/withastro/astro/compare/[email protected]@4.15.11)

##### Patch Changes

-
[#&#8203;12097](https://redirect.github.com/withastro/astro/pull/12097)
[`11d447f`](https://redirect.github.com/withastro/astro/commit/11d447f66b1a0f39489c2600139ebfb565336ce7)
Thanks [@&#8203;ascorbic](https://redirect.github.com/ascorbic)! - Fixes
error where references in content layer schemas sometimes incorrectly
report as missing

-
[#&#8203;12108](https://redirect.github.com/withastro/astro/pull/12108)
[`918953b`](https://redirect.github.com/withastro/astro/commit/918953bd09f057131dfe029e810019c0909345cf)
Thanks [@&#8203;lameuler](https://redirect.github.com/lameuler)! - Fixes
a bug where [data URL
images](https://developer.mozilla.org/en-US/docs/Web/URI/Schemes/data)
were not correctly handled. The bug resulted in an `ENAMETOOLONG` error.

-
[#&#8203;12105](https://redirect.github.com/withastro/astro/pull/12105)
[`42037f3`](https://redirect.github.com/withastro/astro/commit/42037f33e644d5a2bfba71377697fc7336ecb15b)
Thanks [@&#8203;ascorbic](https://redirect.github.com/ascorbic)! -
Returns custom statusText that has been set in a Response

-
[#&#8203;12109](https://redirect.github.com/withastro/astro/pull/12109)
[`ea22558`](https://redirect.github.com/withastro/astro/commit/ea225585fd12d27006434266163512ca66ad572b)
Thanks [@&#8203;ematipico](https://redirect.github.com/ematipico)! -
Fixes a regression that was introduced by an internal refactor of how
the middleware is loaded by the Astro application. The regression was
introduced by
[#&#8203;11550](https://redirect.github.com/withastro/astro/pull/11550).

When the edge middleware feature is opted in, Astro removes the
middleware function from the SSR manifest, and this wasn't taken into
account during the refactor.

-
[#&#8203;12106](https://redirect.github.com/withastro/astro/pull/12106)
[`d3a74da`](https://redirect.github.com/withastro/astro/commit/d3a74da19644477ffc81acf2a3efb26ad3335a5e)
Thanks [@&#8203;ascorbic](https://redirect.github.com/ascorbic)! -
Handles case where an immutable Response object is returned from an
endpoint

-
[#&#8203;12090](https://redirect.github.com/withastro/astro/pull/12090)
[`d49a537`](https://redirect.github.com/withastro/astro/commit/d49a537f2aaccd132154a15f1da4db471272ee90)
Thanks [@&#8203;markjaquith](https://redirect.github.com/markjaquith)! -
Server islands: changes the server island HTML placeholder comment so
that it is much less likely to get removed by HTML minifiers.

</details>

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