[drupal] Update git URL used for automation

[marcwrobel]

https://github.com/drupal/drupal contains all the versions.

https://github.com/drupal/core contains only 8.x - 10.x. It is a subtree split of drupal's /core directory that is only available from 8.x (because of the big Drupal 7->8 rewrite).

Also took the opportunity to normalize the page (#2124).

[hugovk]

Thanks!

Might be worth linking to this chart as well? https://hugovk.github.io/drupal-release-cycle/

[captn3m0]

Triggered automation against the new source (by creating a branch with the same name) on the release-data repo: https://github.com/endoflife-date/release-data/actions/runs/4117457214

[captn3m0]

Adds a bunch of releases: endoflife-date/release-data@6adc0b9.

LGTM.

[marcwrobel]

Might be worth linking to this chart as well? https://hugovk.github.io/drupal-release-cycle/

I don't know, that's neither a releaseImage and this relates to #285. @captn3m0 any idea ?

[captn3m0]

Maybe if the visualization was for fewer releases, and embeddable (no surrounding text, links etc), we could embed it directly using an iframe instead.

[hugovk]

Something like https://hugovk.github.io/drupal-release-cycle/minimal.html ?