try new kubectl download url

.woodpecker/ci.yaml

@@ -7,11 +7,11 @@ steps:
   - name: validate-manifests
     image: alpine:latest
     commands:
-      - apk add --no-cache curl bash
+      - apk add --no-cache curl bash ca-certificates
       - |
         echo "Installing kubectl..."
-        KUBECTL_VERSION=$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)
-        curl -LO "https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl"
+        KUBECTL_VERSION=$(curl -s https://dl.k8s.io/release/stable.txt)
+        curl -LO --fail https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl
         chmod +x kubectl
         mv kubectl /usr/local/bin/
       - |