Compas slicer webpage is not correct everywhere

[joburger]

Some links on the compas slicer pages still have outdated urls such as:

• Github link the top right corner
• This page https://compas.dev/compas_slicer/citing.html

Needs to be changed

[ioannaMitropoulou]

Also in the installation instructions it says: git clone https://github.com/dbt-ethz/compas_slicer.git

[ioannaMitropoulou]

At the moment all links seem to be fixed, except the one that is on the up-right button of the webpage that leads to github.