[DO] Updating incorrect day example

[Oxyjun]

Summary

Fixing millisecond to day inaccuracy as mentioned in #27498.

Closes #27498

Screenshots (optional)

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• The change adheres to the documentation style guide.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/docs/durable-objects/	@elithrar, @vy-ton, @joshthoward, @oxyjun, @lambrospetrou, @mikenomitch, @cloudflare/pcx-technical-writing, @cloudflare/workers-runtime-1

[github-actions]

Preview URL: https://7c5a3b06.preview.developers.cloudflare.com
Preview Branch URL: https://jun-do-date-example-fix.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/durable-objects/api/sqlite-storage-api/	https://jun-do-date-example-fix.preview.developers.cloudflare.com/durable-objects/api/sqlite-storage-api/