Announcement page doesn't mention date

[ryanofsky]

Announcement page https://bitcoinops.org/en/announcing-bitcoin-optech starts with "Today we’re announcing our new project.." but the date of announcement (July 20) doesn't appear anywhere on the page. Ideally the page would have a byline with date so the text is sensible in the future.

[jnewbery]

Thanks! You're right. Will update.