Bump System.Net.Http from 4.3.3 to 4.3.4 in /src/KeepKey.Net.UnitTest#17

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dependabot/nuget/src/KeepKey.Net.UnitTest/System.Net.Http-4.3.4MelbourneDeveloper/KeepKey.Net:dependabot/nuget/src/KeepKey.Net.UnitTest/System.Net.Http-4.3.4Copy head branch name to clipboard