fix(deps): update dependency astro to v4.15.9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
astro (source)	4.15.8 -> 4.15.9

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Release Notes

withastro/astro (astro)

v4.15.9

Compare Source

Patch Changes

• #​12034 5b3ddfa Thanks @​ematipico! - Fixes an issue where the middleware wasn't called when a project uses 404.astro.

• #​12042 243ecb6 Thanks @​ematipico! - Fixes a problem in the Container API, where a polyfill wasn't correctly applied. This caused an issue in some environments where crypto isn't supported.

• #​12038 26ea5e8 Thanks @​ascorbic! - Resolves image paths in content layer with initial slash as project-relative

  When using the image() schema helper, previously paths with an initial slash were treated as public URLs. This was to match the behavior of markdown images. However this is a change from before, where paths with an initial slash were treated as project-relative. This change restores the previous behavior, so that paths with an initial slash are treated as project-relative.

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