Bump govuk-components and govuk-frontend

[JamieCleare2525]

Context

• Bump govuk-components from 4.1.2 to 5.0.0 (Closes Bump govuk-components from 4.1.2 to 5.0.0 #19)
• Bump govuk-frontend from 4.7.0 to 5.0.0 (Closes Bump govuk-frontend from 4.7.0 to 5.0.0 #17)

Changes proposed in this pull request

Followed the Release notes to bump the versions of govuk-components gem and govuk-frontend package to latest versions.

Guidance to review

• Run yarn install
• Nothing should break and everything should look exactly how it did before.

Link to Trello card

https://trello.com/c/cqw6yaRb/68-upgrade-govuk-frontend-and-govuk-components-to-v500

Things to check

• If the code removes any existing feature flags, a data migration has also been added to delete the entry from the database
• This code does not rely on migrations in the same Pull Request
• If this code includes a migration adding or changing columns, it also backfills existing records for consistency
• If this code adds a column to the DB, decide whether it needs to be in analytics yml file or analytics blocklist
• API release notes have been updated if necessary
• If it adds a significant user-facing change, is it documented in the CHANGELOG?
• Required environment variables have been updated or added to the Azure KeyVault

Screenshots

[CatalinVoineag]

Pulled this on local, works as expected 👍🏻

[elceebee]

Testing locally, all good!