chore(deps): update dependency ghost to v6.57.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ghost (source)	6.57.0 → 6.57.1

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Release Notes

TryGhost/Ghost (ghost)

v6.57.1

Compare Source

• 🐛 Fixed contrast_text_color returning incorrect text color for some light backgrounds (#​29834) - Evans Juma
• 🐛 Made the member.edited webhook fire on cancellation and reinstatement of paid plans (#​29814) - Cathy Sarisky
• 🐛 Fixed admin toolbar redirect loops on subdirectory sites (#​29838) - louisghost
• 🐛 Fixed missing tiers in previous part of webhook (#​29810) - Cathy Sarisky
• 🐛 Fixed theme settings reset when editing Source or Casper (#​29839) - Kevin Ansfield

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View the changelog for full details: TryGhost/Ghost@v6.57.0...v6.57.1

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