chore(deps): externalise System.Threading.Tasks.Dataflow

This allows the framework to be the source of the dependency rather externally sourcing. This is to avoid potential conflicts.

closes camunda-community-hub#669

Client/Client.csproj

@@ -47,7 +47,6 @@ This release is based on the Zeebe 8.4.1 release (https://github.com/zeebe-io/ze
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.1" />
-    <PackageReference Include="System.Threading.Tasks.Dataflow" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup>
@@ -56,10 +55,7 @@ This release is based on the Zeebe 8.4.1 release (https://github.com/zeebe-io/ze
 
 
   <ItemGroup>
-    <None Include="..\docs\icon.png">
-      <Pack>True</Pack>
-      <PackagePath></PackagePath>
-    </None>
+    <None Include="..\docs\icon.png" Pack="true" PackagePath="" />
     <None Include="..\README.md" Pack="true" PackagePath="\" />
   </ItemGroup>