Change release page to explicitly mark old releases as such

Extracted from https://gitlab.eclipse.org/eclipse-wg/ide-wg/eclipseide.org/-/issues/10#note_679501

Can we change https://www.eclipse.org/downloads/packages/release to emphasize old vs current releases, e.g.:

From:

to (a beutified version of):

It is less of an issue than it used to be, but people still download old releases without understanding.