Downgrade FsToolkit so we can continue using 6.0.3 in our tests

Author: abelbraaksma

src/FSharp.Control.TaskSeq.Test/FSharp.Control.TaskSeq.Test.fsproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
@@ -54,7 +54,7 @@
     <!-- align test project with minimal required version for TaskSeq -->
     <!-- we use 6.0.3 here and not 6.0.2 because TaskResult lib requires it-->
     <PackageReference Update="FSharp.Core" Version="6.0.3" />
-    <PackageReference Include="FsToolkit.ErrorHandling.TaskResult" Version="4.0.0" />
+    <PackageReference Include="FsToolkit.ErrorHandling.TaskResult" Version="3.2.0" />
     <PackageReference Include="FsUnit.xUnit" Version="5.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.0" />
     <PackageReference Include="xunit" Version="2.4.2" />