Fix the driest and wettest years

[dlercier]

• 2022 will be chosen as the driest year. Source : https://meteofrance.fr/actualite/publications/2022-les-bilans-climatiques
• 1960 will be chosen as the wettest year. Source : https://meteofrance.com/actualites-et-dossiers/actualites/2024-une-des-dix-annees-les-plus-pluvieuses-jamais-observees#&gid=1&pid=1