Update to latest System.Text.Json with security fix (#581)

Author: erikmav

Directory.Packages.props

@@ -15,7 +15,7 @@
     <PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageVersion Include="System.CodeDom" Version="8.0.0" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
-    <PackageVersion Include="System.Text.Json" Version="8.0.4" />
+    <PackageVersion Include="System.Text.Json" Version="8.0.5" />
     <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="8.0.1" /> 
 
     <!-- Pinning vulnerable packages -->