engine: use deb822 apt source format in ubuntu install

Signed-off-by: David Karlsson <[email protected]>

Author: dvdksn

content/manuals/engine/install/ubuntu.md

@@ -133,10 +133,14 @@ Docker from the repository.
    sudo chmod a+r /etc/apt/keyrings/docker.asc
 
    # Add the repository to Apt sources:
-   echo \
-     "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] {{% param "download-url-base" %}} \
-     $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
-     sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+   sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
+   Types: deb
+   URIs: {{% param "download-url-base" %}}
+   Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
+   Components: stable
+   Signed-By: /etc/apt/keyrings/docker.asc
+   EOF
+
    sudo apt-get update
    ```