chore(deps): update dependency vanilla-framework to v4.55.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vanilla-framework (source)	4.52.0 → 4.55.1

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Release Notes

canonical/vanilla-framework (vanilla-framework)

v4.55.1

Compare Source

v4.55.0

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What's Changed

• chore: skip Percy on Blocked PRs even with the Percy label by @​Onibenjo in #​5812
• feat: Update position of CTA block in Tiered list and Equal heights patterns by @​muhammad-ali-pk in #​5816
• Update Content Card to accept stacked_image param and for content_type to accept lists by @​petesfrench in #​5819

Full Changelog: canonical/vanilla-framework@v4.52.0...v4.55.0

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