Upgrade

# Sample value of ${higress_version} : v1.1.0
kubectl apply -f https://github.com/alibaba/higress/releases/download/${higress_version}/customresourcedefinitions.gen.yaml
helm repo update
helm upgrade higress -n higress-system higress.io/higress

# ${higress_dir} is the path of Higress' installation directory
curl -fsSL https://higress.io/standalone/get-higress.sh | bash -s -- "${higress_dir}" -u