Use env vars for release

Author: gunnarvelle

.github/workflows/release.yml

@@ -84,18 +84,18 @@ jobs:
           echo -n "$GPG_KEY" | base64 --decode | gpg --import
       - name: Install kubectl
         run: |
-          curl -L https://storage.googleapis.com/kubernetes-release/release/v1.21.11/bin/linux/amd64/kubectl > kubectl
+          curl -L https://dl.k8s.io/release/v${{ vars.KUBECTL_VERSION }}/bin/linux/amd64/kubectl > kubectl
           sudo mv kubectl /home/runner/bin/kubectl
           sudo chmod +x /home/runner/bin/kubectl
           mkdir -p ~/.kube
       - name: Install aws-iam-authenticator
         run: |
-          sudo curl -L https://amazon-eks.s3-us-west-2.amazonaws.com/1.12.7/2019-03-27/bin/linux/amd64/aws-iam-authenticator > aws-iam-authenticator
+          sudo curl -L https://github.com/kubernetes-sigs/aws-iam-authenticator/releases/download/v${{ vars.AWS_IAM_AUTHENTICATOR_VERSION }}/aws-iam-authenticator_${{ vars.AWS_IAM_AUTHENTICATOR_VERSION }}_linux_amd64 > aws-iam-authenticator
           sudo mv aws-iam-authenticator /home/runner/bin/aws-iam-authenticator
           sudo chmod +x /home/runner/bin/aws-iam-authenticator
       - name: Install helm /w push-plugin
         run: |
-          curl -L https://get.helm.sh/helm-v3.11.3-linux-amd64.tar.gz > /tmp/helm.tar.gz
+          curl -L https://get.helm.sh/helm-v${{ vars.HELM_VERSION }}-linux-amd64.tar.gz > /tmp/helm.tar.gz
           tar xvzf /tmp/helm.tar.gz -C /tmp/
           sudo mv /tmp/linux-amd64/helm /home/runner/bin/
           sudo chmod +x /home/runner/bin/helm