💥 remove NET 7.0 target, add .NETFramework 4.8

Signed-off-by: Yves Bastide <[email protected]>

Author: ybastide

RobotsTxt/RobotsTxt.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net7.0;net8.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>net48;net8.0;net9.0</TargetFrameworks>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <Configurations>Debug;Release</Configurations>