fix(dotnet-windows): specify versions for dotnet packages to prevent errors in Windows

[iankhou]

Fixes errors preventing Windows environment test from succeeding.

@jsii/dotnet-runtime:   Failed to restore D:\a\jsii\jsii\packages\@jsii\dotnet-runtime\src\Amazon.JSII.Analyzers.UnitTests\Amazon.JSII.Analyzers.UnitTests.csproj (in 41.02 sec).
@jsii/dotnet-runtime:   Failed to restore D:\a\jsii\jsii\packages\@jsii\dotnet-runtime\src\Amazon.JSII.Runtime.UnitTests\Amazon.JSII.Runtime.UnitTests.csproj (in 41.02 sec).

@jsii/dotnet-runtime-test:   Failed to restore D:\a\jsii\jsii\packages\@jsii\dotnet-runtime-test\test\Amazon.JSII.Runtime.IntegrationTests\Amazon.JSII.Runtime.IntegrationTests.csproj (in 18.44 sec).

Several instances of NU1604 Warning as Error:

@jsii/dotnet-runtime-test: D:\a\jsii\jsii\packages\@jsii\dotnet-runtime-test\test\Amazon.JSII.Runtime.IntegrationTests\Amazon.JSII.Runtime.IntegrationTests.csproj : error NU1604: Warning As Error: Project dependency Microsoft.Extensions.Logging does not contain an inclusive lower bound. Include a lower bound in the dependency version to ensure consistent restore results.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[mergify]

Thank you for contributing! ❤️ I will now look into making sure the PR is up-to-date, then proceed to try and merge it!

[mergify]

Merging (with squash)...