Bump System.Text.RegularExpressions from 4.3.0 to 4.3.1#15

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dependabot/nuget/exercises/testing-code/solution/Tests/System.Text.RegularExpressions-4.3.1temporalio/edu-102-dotnet-code:dependabot/nuget/exercises/testing-code/solution/Tests/System.Text.RegularExpressions-4.3.1Copy head branch name to clipboard