Bumped to the latest version available.
Also tested the `web.archive.org` backup to avoid broken downloads when
the tarball is removed from the official download mirror.
The `geogebra` package is subject to break as upstream removes versioned
packages from their download server when five new releases are comming.
This is why I had to fix almost monthly the package by bumping the
version (these can be found by running `git log --online | grep
geogebra:`). As the package didn't cause any issues for several months
now I guess that using `archive.org` seems to be a suitable solution for
now.
/cc @sternenseemann @matthewbauer
