CLDR-18360 Update week of year numbering migration note

[AEApple]

CLDR-18360

Update week of year numbering migration note

• [ ] This PR completes the ticket.

ALLOW_MANY_COMMITS=true

[github-actions[bot]]

✨ deployed to https://f96b4e0e.cldr.pages.dev

[srl295]

@AEApple this PR will cause a split ticket since we're now branched. if possible clone the ticket squash the pr

[jira-pull-request-webhook[bot]]

Hooray! The files in the branch are the same across the force-push. 😃

~ Your Friendly Jira-GitHub PR Checker Bot

[github-actions[bot]]

✨ deployed to https://0dd68f24.cldr.pages.dev

[github-actions[bot]]

✨ deployed to https://e8f6a745.cldr.pages.dev

[AEApple]

Okay, I fixed the merge conflict, updated based on the feedback and updated the commit message. Please let me know if I missed anything.