Release checklist

[nebfield]

• [x] Explain what metric means on figures (link out to glossary?)
• [x] Use clear language instead of maths for the axis labels
• [x] Fix missing facets, covered by:
  • [x] #4
  • [x] https://github.com/intervene-EU-H2020/pgsCompaR/issues/2
• [x] Add preprint links