vcpkg/scripts/azure-pipelines/linux/changing-linux-packages.md

• Update provision-image.sh to add the new apt package.
• Update managed-image.json to add the new apt package to the very long line of packages.
• Update the managed image named CPP_GITHUB\PrLin-1ES\PrLin-1ESImage by copying the contents of managed-image.json to the Settings\Image text box.