Update SMA version to 7.4.7

[bergmeister]

PR Summary

Since PowerShell 7.2 is not supported any more, we can upgrade the SMA version. Somehow 7.4.8 is not published, raised issue here: PowerShell/PowerShell#25162

PR Checklist

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• Summarized changes
• Change is not breaking
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[bergmeister]

Not sure why the build fails on this @andyleejordan ? In csproj the SMA reference used to be conditional based on the target framework so don't understand how it even works now with the current 7.2 target that should only apply for PowerShell 7 builds but not 3, etc
It seems the main build is broken now for some reason as even a simple doc PR like #2076 fails with this

On another note, what do you think about a new release now that we've merged all the recent PRs? The SMA update is the only one I was thinking of doing before the release.

[andyleejordan]

Not sure why the build fails on this @andyleejordan ? In csproj the SMA reference used to be conditional based on the target framework so don't understand how it even works now with the current 7.2 target that should only apply for PowerShell 7 builds but not 3, etc It seems the main build is broken now for some reason as even a simple doc PR like #2076 fails with this

It seems the GitHub Actions Ubuntu image is failing to add dotnet to the path when the task installs it. I fixed it in #2080 and rebased the PRs.

On another note, what do you think about a new release now that we've merged all the recent PRs? The SMA update is the only one I was thinking of doing before the release.

Yes, planning on it.

[andyleejordan]

Side note, are we stuck on this version because of PowerShell 3 support? If not let's update it to 5.1.1.

[bergmeister]

Yes. Although it was an improvement to have as not all projects had to reference the psv3/4/5 reference assemblies. since it's just for referencing and not shipped, I don't mind TBH. Regarding dropping support, how about we start soft and just bump the minimum version in manifest and see what people's feedback is?