Workaround for bug in EF Core 6.0.2

Pinned to v6.0.1 due to dotnet/efcore#27436

Author: Bart Koelman

Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworkName>net6.0</TargetFrameworkName>
     <AspNetVersion>6.0.*</AspNetVersion>
-    <EFCoreVersion>6.0.*</EFCoreVersion>
+    <EFCoreVersion>6.0.1</EFCoreVersion>
     <EFCorePostgresVersion>6.0.*</EFCorePostgresVersion>
     <MicrosoftCodeAnalysisVersion>4.*</MicrosoftCodeAnalysisVersion>
     <HumanizerVersion>2.*</HumanizerVersion>