Adoptium JDK installation fails on WSL Ubuntu 22.04

Cross-posting from SO, due to no answer.

My intent is to install OpenJDK 8, using the docs provided by Microsoft, for the Synapse Spark extension.

The Adoptium installation procedure fails in my fresh WSL Ubuntu distro.

apt install -y wget apt-transport-httpswget -qO - https://packages.adoptium.net/artifactory/api/gpg/key/public | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/adoptium.gpg > /dev/nullecho "deb https://packages.adoptium.net/artifactory/deb $(awk -F= '/^jammy/{print$2}' /etc/os-release) main" | sudo tee /etc/apt/sources.list.d/adoptium.list

results in the following content of the target file:

deb https://packages.adoptium.net/artifactory/deb  main

so trying sudo apt update yields

E: Malformed entry 1 in list file /etc/apt/sources.list.d/adoptium.list (Component)E: The list of sources could not be read.

So the echo command fails in inserting the string argument into the repo URL. When trying to reach the /artifactory repo in the browser for debugging, I get redirected to the UI web site. Is there any simple fix for this issue?