Update DDEV docs on fixed to use ddev-upsun addon #5470
Description
Priority
3 - Not urgent - can be addressed as team bandwidth permits
Where should the changes be made?
https://fixed.docs.upsun.com/development/local/ddev.html#4-connect-ddev-to-your-project
What exactly should be updated?
DDEV docs now indicate to use the ddev/ddev-upsun add-on vs the ddev/ddev-platformsh add-on listed in the docs.
Consider using ddev add-on get ddev/ddev-upsun (ddev-upsun) for more complete Upsun Fixed integration.
Users have mentioned receiving API deprecation errors when trying to use the ddev-platformsh add-on with Upsun Fixed. Last release was just under a year ago.
Optional: Additional context
No response