Allow patch releases of the SDK to be used
Allow patch releases of the SDK to be used

Accorsing to the documentation [here](https://docs.microsoft.com/dotnet/core/tools/global-json) setting `rollForward` to `latestPatch` should allow newer SDKs to be used _only_ if the patch digits of the SDK have changed.

So under these vallues and `6.0.1xx` SDK is valid but `6.0.200` would not be.

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