Upgrade to Helm 3.8

Adds support for OCI registries without the feature flag, and support
for Kubernetes 1.23.

Author: Pluies

Dockerfile

@@ -10,7 +10,7 @@ RUN chmod +x /usr/bin/kubectl
 RUN curl -o /usr/bin/aws-iam-authenticator https://amazon-eks.s3.us-west-2.amazonaws.com/1.21.2/2021-07-05/bin/linux/amd64/aws-iam-authenticator
 RUN chmod +x /usr/bin/aws-iam-authenticator
 
-RUN wget https://get.helm.sh/helm-v3.7.2-linux-amd64.tar.gz -O - | tar -xzO linux-amd64/helm > /usr/local/bin/helm 
+RUN wget https://get.helm.sh/helm-v3.8.0-linux-amd64.tar.gz -O - | tar -xzO linux-amd64/helm > /usr/local/bin/helm
 RUN chmod +x /usr/local/bin/helm
 
 COPY entrypoint.sh /entrypoint.sh