Update to scaffolding submodules for dotnet tool resolution workaround

[seancpeters]

Summary of the changes (Less than 80 chars)

• Update the scaffolding submodule

Addresses dotnet/sdk#2698

[seancpeters]

@natemcmaster @wli3 @vijayrkn

[natemcmaster]

Once PR checks pass, feel free to merge.

FYI @muratg @mmitche @Eilon - this should resolve the last 2.2.1 bug we're expecting to take. Once it, we're ready to re-build 2.2.1

[seancpeters]

We got some test failures in the ci build, but they don't look related to scaffolding. I don't know much about this repo, perhaps someone who knows it better has a better understanding of what may have caused these errors.

Also, I don't have rights to merge in this repo, so once we're good, someone else will have to.

[natemcmaster]

Test failures in HttpSys and Kestrel are known, right @Tratcher @muratg ?

Merging so we can get a 2.2.1 build going.

[muratg]

Yeah, I think there are issues tracking the failures. Thanks for unblocking the 2.2.1 build!