Don't set IsAotCompatible on net6.0 build (not supported there)

Author: maxkatz6

src/ExCSS/ExCSS.csproj

@@ -33,11 +33,15 @@
 
 	<!-- Trimming parameters -->
 	<PropertyGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">
-		<IsAotCompatible>true</IsAotCompatible>
 		<IsTrimmable>true</IsTrimmable>
 		<SuppressTrimAnalysisWarnings>false</SuppressTrimAnalysisWarnings>
 		<EnableTrimAnalyzer>true</EnableTrimAnalyzer>
 	</PropertyGroup>
+	<!-- AOT parameters -->
+	<PropertyGroup Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0'))">
+		<IsAotCompatible>true</IsAotCompatible>
+		<EnableAotAnalyzer>true</EnableAotAnalyzer>
+	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(TargetFramework)' != ''">
 		<LangVersion>9.0</LangVersion>