Bump System.Net.Http from 4.3.0 to 4.3.4 in /Sample-WPF#41

dependabot[bot] wants to merge 1 commit intomastermicrosoft/Cognitive-Emotion-Windows:masterfrom

dependabot/nuget/Sample-WPF/System.Net.Http-4.3.4microsoft/Cognitive-Emotion-Windows:dependabot/nuget/Sample-WPF/System.Net.Http-4.3.4Copy head branch name to clipboard