Update dotnet workloads along with dotnet sdks

[TonEnfer]

Tell us more.

Hello!

Workloads in dotnet, similar to SDK version, support versioning in the global.json file
Documentation - https://learn.microsoft.com/en-us/dotnet/core/tools/dotnet-workload-sets#use-globaljson-for-the-workload-set-version

Currently, renovate only updates the SDK version, but ignores the workload version update. It seems like the right thing to do is to update them along with the SDK version.

Reproduction - https://github.com/TonEnfer/renovate-reproduction-36924

[github-actions[bot]]

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