Bump System.Net.Http from 4.3.3 to 4.3.4 in /src/Microsoft.Azure.EventHubs#416

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dependabot/nuget/src/Microsoft.Azure.EventHubs/System.Net.Http-4.3.4Azure/azure-event-hubs-dotnet:dependabot/nuget/src/Microsoft.Azure.EventHubs/System.Net.Http-4.3.4Copy head branch name to clipboard