Add timeline element

[davidfurey]

What does this change?

Updates content-api-model to latest version which includes the new timeline element. Currently set to a preview release, this should be updated to a proper release once guardian/content-api-models#245 is merged

[gu-scala-library-release]

@davidfurey has published a preview version of this PR with release workflow run #46, based on commit 5c88d13:

26.0.0-PREVIEW.timeline-model.2024-03-26T1100.5c88d136

Want to make another preview release?

Click 'Run workflow' in the GitHub UI, specifying the timeline-model branch, or use the GitHub CLI command:

gh workflow run release.yml --ref timeline-model

Want to make a full release after this PR is merged?

Click 'Run workflow' in the GitHub UI, leaving the branch as the default, or use the GitHub CLI command:

gh workflow run release.yml

[Divs-B]

Looks good 👍

Regarding failing CI, the workaround is -

• Either Re-run the failed job or entire workflow again.
  Or
• Change the version for Enricomi api from v1 to v2 that is used in testtopush.yml file :
  

  content-api-scala-client/.github/workflows/testonpush.yml

  Line 34 in 5fce660

  - uses: EnricoMi/publish-unit-test-result-action@v1

We had this similar failing issue in Apple-news and @rtyley mentioned to fix it by upgrading the version to v2.
PR for reference: https://github.com/guardian/apple-news/pull/320
Let us know if you have any questions.

[Fweddi]

Thanks @Divs-B, I have raised a PR to address your suggestion: #416.