fix: Update the URL for the Debian package for Helm (#549)

Author: siegfriedweber

template/.github/workflows/build.yml.j2

@@ -383,8 +383,8 @@ jobs:
         run: |
           # Installing helm and yq on ubicloud-standard-8-arm only
           if [ "$(arch)" = "aarch64" ]; then
-            curl https://baltocdn.com/helm/signing.asc | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null
-            echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://baltocdn.com/helm/stable/debian/ all main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
+            curl -fsSL https://packages.buildkite.com/helm-linux/helm-debian/gpgkey | gpg --dearmor | sudo tee /usr/share/keyrings/helm.gpg > /dev/null
+            echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/helm.gpg] https://packages.buildkite.com/helm-linux/helm-debian/any/ any main" | sudo tee /etc/apt/sources.list.d/helm-stable-debian.list
             sudo apt-get -y update
             sudo apt-get -y install helm
             sudo wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_arm64 -O /usr/bin/yq && sudo chmod +x /usr/bin/yq