Bump Grpc.Net.ClientFactory to fix build warning

Author: kzu

src/WhatsApp/WhatsApp.csproj

@@ -28,6 +28,7 @@
     <PackageReference Include="Devlooped.JQ" Version="1.7.1.8" PackExclude="contentFiles" />
     <PackageReference Include="Devlooped.TableStorage" Version="5.4.0" />
 
+    <PackageReference Include="Grpc.Net.ClientFactory" Version="2.71.0" />
     <PackageReference Include="NuGetizer" Version="1.2.4" />
     <PackageReference Include="PolySharp" Version="1.15.0" />
     <PackageReference Include="ThisAssembly.AssemblyInfo" Version="2.0.14" PrivateAssets="all" />