Update dependency govuk_tech_docs to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
govuk_tech_docs	3.4.0 -> 4.1.1

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Release Notes

alphagov/tech-docs-gem (govuk_tech_docs)

v4.1.1

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v4.1.0

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• Fix missing manifest.json from govuk-frontend
• Stable soft for left navigation

v4.0.0

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Breaking

• BREAKING: drop support for end-of-life Ruby versions 2.7 and 3.0. The minimum Ruby version is now 3.1.
• BREAKING: drop support for IE8
• Upgrade to govuk-frontend v5.7.1 and introduce new Javascript entry point

To upgrade you need to:

• create a govuk_frontend.js file your project’s source/assets/javascripts directory
• add //= require govuk_frontend_all into it

Fixes

• Update gem dependencies.
• Declare some missing indirect dependencies to prepare for Ruby 3.4. This also resolves some warnings about this at build time.
• Remove aria-hidden from search label to let assistive technologies see its accessible name
• Use hidden attribute to show/hide expiry notices instead of just CSS
• Only use dialog role for table of contents when it behaves like one (accessibility fix)
• Prevent interactive elements being obscured by sticky table of contents header
• Only wrap images with alt text in hyperlinks

v3.5.0

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New features

• Update the Crown logo and govuk-frontend

  See pull request #​344: Upgrade govuk-frontend and the crown logo for more details.

https://github.com/alphagov/tech-docs-gem/pull/344

v3.4.5

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... in a clone of the [email protected]:hmcts/hmcts.github.io.git repository
on the renovate/govuk_tech_docs-4.x-lockfile branch (ℹ️ how do I use this?):

curl -s -S -L 'https://raw.githubusercontent.com/check-spelling/check-spelling/v0.0.22/apply.pl' |
perl - 'https://github.com/hmcts/hmcts.github.io/actions/runs/11839138506/attempts/1'

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