This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [astro](https://astro.build) ([source](https://github.com/withastro/astro/tree/HEAD/packages/astro)) | [`5.17.3` → `5.18.0`](https://renovatebot.com/diffs/npm/astro/5.17.3/5.18.0) | ![age](https://developer.mend.io/api/mc/badges/age/npm/astro/5.18.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/5.17.3/5.18.0?slim=true) |

---

### Release Notes

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

### [`v5.18.0`](https://github.com/withastro/astro/releases/tag/astro%405.18.0)

[Compare Source](https://github.com/withastro/astro/compare/astro@5.17.3...astro@5.18.0)

##### Minor Changes

- [#&#8203;15589](withastro/astro#15589) [`b7dd447`](withastro/astro@b7dd447) Thanks [@&#8203;qzio](https://github.com/qzio)! - Adds a new `security.actionBodySizeLimit` option to configure the maximum size of Astro Actions request bodies.

  This lets you increase the default 1 MB limit when your actions need to accept larger payloads. For example, actions that handle file uploads or large JSON payloads can now opt in to a higher limit.

  If you do not set this option, Astro continues to enforce the 1 MB default to help prevent abuse.

  ```js
  // astro.config.mjs
  export default defineConfig({
    security: {
      actionBodySizeLimit: 10 * 1024 * 1024, // set to 10 MB
    },
  });
  ```

##### Patch Changes

- [#&#8203;15594](withastro/astro#15594) [`efae11c`](withastro/astro@efae11c) Thanks [@&#8203;qzio](https://github.com/qzio)! - Fix X-Forwarded-Proto validation when allowedDomains includes both protocol and hostname fields. The protocol check no longer fails due to hostname mismatch against the hardcoded test URL.

</details>

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