[Merge] ~calvinmwadime/update-manager:rename-ua into update-manager:main

[Calvin Mwadime Makokha]

> Thanks for the merge request, Calvin. Just one small amendment and it will be
> good to go.

I have updated the version.
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https://code.launchpad.net/~calvinmwadime/update-manager/+git/update-manager/+merge/462230
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~calvinmwadime/update-manager:rename-ua into update-manager:main.