fix: downgrade System.Threading.Tasks.Dataflow from 4.11.1 to 4.9.0 (#222)

Author: JamieMagee

Directory.Packages.props

@@ -39,7 +39,7 @@
         <PackageVersion Include="System.Memory" Version="4.5.5"/>
         <PackageVersion Include="System.Reactive" Version="5.0.0"/>
         <PackageVersion Include="System.Runtime.Loader" Version="4.3.0"/>
-        <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="4.11.1"/>
+        <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="4.9.0"/>
         <PackageVersion Include="yamldotnet" Version="11.2.1"/>
         <PackageVersion Include="Faker.net" Version="2.0.154"/>
         <PackageVersion Include="Valleysoft.DockerfileModel" Version="1.0.0"/>