Bump System.Net.Http from 4.3.0 to 4.3.4 (#1276)

Author: dependabot[bot]

samples/Correlation.Samples/Correlation.Samples.csproj

@@ -20,6 +20,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.Data.SqlClient" />
+    <PackageReference Include="System.Net.Http" />
     <None Update="appsettings.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>