fix: Change Microsoft.Extension.Logging.Abstractions version to align with other csproj versions

Author: Reikyo

Fakes/OpenActive.FakeDatabase.NET/OpenActive.FakeDatabase.NET.csproj

@@ -31,7 +31,7 @@
 
   <ItemGroup>
     <PackageReference Include="Bogus" Version="33.0.2" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="2.1.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="ServiceStack.OrmLite.Sqlite.Core" Version="5.11.0" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />