use correct framework

Author: kasperk81

sample/ConsoleDemo/ConsoleDemo.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFrameworks>net80</TargetFrameworks>
+        <TargetFrameworks>net8.0</TargetFrameworks>
         <IsPackable>false</IsPackable>
     </PropertyGroup>
     <ItemGroup>
@@ -10,4 +10,4 @@
     <ItemGroup>
       <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
     </ItemGroup>
-</Project>
+</Project>