Try fix analysis level

Author: Skrypt

Directory.Packages.props

@@ -12,6 +12,11 @@
     <LombiqTestsUIVersion>12.1.1-alpha.14.osoe-1057</LombiqTestsUIVersion>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(TargetFramework)' != 'net8.0'" >
+      <LangVersion>13.0</LangVersion>
+      <AnalysisLevel>9.0</AnalysisLevel>
+  </PropertyGroup>
+
   <ItemGroup>
     <PackageVersion Include="Lombiq.Analyzers.OrchardCore" Version="5.2.0" />
     <PackageVersion Include="Lombiq.HelpfulLibraries.OrchardCore" Version="$(LombiqHelpfulLibrariesVersion)" />