Bump System.IO.Abstractions.TestingHelpers from 16.1.10 to 16.1.26 in /source/tests/data-mapper-test#92

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dependabot/nuget/source/tests/data-mapper-test/System.IO.Abstractions.TestingHelpers-16.1.26buhlergroup/data-mapper-dotnet:dependabot/nuget/source/tests/data-mapper-test/System.IO.Abstractions.TestingHelpers-16.1.26Copy head branch name to clipboard