Ubuntu22: add maintainer test comment and fix download message typo - doagn

[doagn]

This pull request makes a small but meaningful improvement to the Installer/Ubuntu22/ubuntu22.sh script.

Changes

• Added a maintainer test comment after the pkg install wget -y line to confirm that I can correctly clone, edit, commit, and push changes to this repository.
• Fixed a typo in the Rootfs download message (base on your internet speed → based on your internet speed) to improve clarity for users.

Why this is useful

• The maintainer test comment demonstrates that I understand the contribution workflow (fork → clone → edit → commit → push → PR).
• The typo fix slightly improves the user experience by showing a grammatically correct message during the Rootfs download step.

I am happy to make further adjustments or help with additional installer improvements if needed.