As stated here, but make sure there are no other specific things for upgrading from a version to another.
Upgrade CRDs
kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.8.2/cert-manager.crds.yaml
Upgrade cert-manager
helm upgrade --version 1.8.2 cert-manager jetstack/cert-manager --namespace cert-manager
Check the pods
kubectl get pods --namespace cert-manager
Change the configs for our nodes on each server
# Contabo
ssh -i ~/.ssh/ansible_noob_id_rsa ansible_noob@SERVER-IP-1 # Master
ssh -i ~/.ssh/ansible_noob_id_rsa ansible_noob@SERVER-IP-2
sudo su -
# Sometimes you might need to only change on the server config
nano /etc/rancher/rke2/config.yaml
# For server
systemctl restart rke2-server
# For agent
systemctl restart rke2-agent
# Check the logs
journalctl -u rke2-server -f
journalctl -u rke2-agent -f