Why use os matrix?

[purplecabbage]

Expected Behaviour

Code is executed once on ubuntu-latest.

Actual Behaviour

os matrix is used, implying that other os' could be added, which will cause the code to run more than once.
The actual action code checks if it is running in ubuntu and will 'do less' if it is not, but it should just not happen.

[shazron]

should this issue be in @adobe/generator-aio-app repo instead?

[shazron]

There are no Github Actions files in this repo. Closing.