Bump System.Text.RegularExpressions from 4.3.0 to 4.3.1 in /CircuitBreakerREST/iOS#18

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dependabot/nuget/CircuitBreakerREST/iOS/System.Text.RegularExpressions-4.3.1davidbritch/xamarin-forms:dependabot/nuget/CircuitBreakerREST/iOS/System.Text.RegularExpressions-4.3.1Copy head branch name to clipboard