Update dependency @govuk-prototype-kit/step-by-step to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@govuk-prototype-kit/step-by-step	2.2.4 → 3.0.0

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Release Notes

alphagov/govuk-prototype-kit-step-by-step (@​govuk-prototype-kit/step-by-step)

v3.0.0

Compare Source

Breaking changes

• #​27 - Support GOV.UK Frontend v6.0

Fixes

• #​26 - Update templates to extend local template instead of prototype kit template

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
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The artifact failure details are included below:

File name: package-lock.json

npm error code ERESOLVE
npm error ERESOLVE unable to resolve dependency tree
npm error
npm error While resolving: govuk-prototype-kit@undefined
npm error Found: govuk-frontend@5.14.0
npm error node_modules/govuk-frontend
npm error   govuk-frontend@"5.14.0" from the root project
npm error
npm error Could not resolve dependency:
npm error peer govuk-frontend@">=6.0.0" from @govuk-prototype-kit/step-by-step@3.0.0
npm error node_modules/@govuk-prototype-kit/step-by-step
npm error   @govuk-prototype-kit/step-by-step@"3.0.0" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.
npm error
npm error
npm error For a full report see:
npm error /runner/cache/others/npm/_logs/2026-04-21T11_29_33_984Z-eresolve-report.txt
npm error A complete log of this run can be found in: /runner/cache/others/npm/_logs/2026-04-21T11_29_33_984Z-debug-0.log