[jdown] Add Text "Joomla 5" for upgrade packages or remove version number

[webgras]

Please describe the problem or your issue

On the homepage there are still a lot mentions of Joomla 4.
Specially in the green button at the top right "Upgrade"
We should change them to Joomla 5 or always state "current version"
https://downloads.joomla.org/

[webgras]

Maybe it is only in the translations:
https://downloads.joomla.org/de/
https://downloads.joomla.org/ca-es/

[fgsw]

All translations (except "English") have the wrong version number.