Add back .NET 8

Author: hazzik

build-common/NHibernate.props

@@ -15,7 +15,7 @@
     <FileVersion Condition="'$(FileVersion)' == ''">$(VersionPrefix).0</FileVersion>
 
     <NhAppTargetFrameworks Condition ="$(NhAppTargetFrameworks) == ''">net48;net10.0</NhAppTargetFrameworks>
-    <NhLibTargetFrameworks Condition ="$(NhLibTargetFrameworks) == ''">net461;net48;netcoreapp2.0;netstandard2.0;netstandard2.1;net6.0;net10.0</NhLibTargetFrameworks>
+    <NhLibTargetFrameworks Condition ="$(NhLibTargetFrameworks) == ''">net461;net48;netcoreapp2.0;netstandard2.0;netstandard2.1;net6.0;net8.0;net10.0</NhLibTargetFrameworks>
     <RuntimeFrameworkVersion Condition="'$(TargetFramework)' == 'netcoreapp2.0'">2.0.3</RuntimeFrameworkVersion>
     <NhNetFx>false</NhNetFx>
     <NhNetFx Condition="$(TargetFramework.StartsWith('net4'))">true</NhNetFx>