Update dependency astro to v4.5.15

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
astro (source)	4.5.14 -> 4.5.15

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Release Notes

withastro/astro (astro)

v4.5.15

Compare Source

Patch Changes

• #​10666 55ddb2ba4889480f776a8d29b9dcd531b9f5ab3e Thanks @​lilnasy! - Fixes an issue where forwarded requests did not include hostname on node-based adapters. This also makes error pages more reliable.

• #​10642 4f5dc14f315eba7ea6ec5cc8e5dacb0cb81288dd Thanks @​OliverSpeir! - Fixes typing issues when using format and quality options with remote images

• #​10616 317d18ef8c9cf4fd13647518e3fd352774a86481 Thanks @​NikolaRHristov! - This change disables the sharp libvips image cache as it errors when the
  file is too small and operations are happening too fast (runs into a race
  condition)

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