Better clarify the purpose of this package (#12)

Fixes: #10

Author: jonathanpeppers

README.md

@@ -1,7 +1,8 @@
 # Xamarin.Legacy.Sdk
 
-An unofficial MSBuild SDK for multitargeting "legacy" Xamarin and .NET 6.
-*Not fully supported.*
+Starting from a .NET 6 project, adds the ability to target legacy
+Xamarin target frameworks such as `monoandroid11.0` or
+`xamarin.ios10`. *Not fully supported.*
 
 ## What is this? When would I need it?
 

src/Xamarin.Legacy.Sdk/Xamarin.Legacy.Sdk.csproj

@@ -6,7 +6,7 @@
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <NoWarn>NU5128</NoWarn>
-    <Description>An unofficial MSBuild SDK for multitargeting "legacy" Xamarin and .NET 6. *Not fully supported*</Description>
+    <Description>Starting from a .NET 6 project, adds the ability to target legacy Xamarin target frameworks such as monoandroid11.0 or xamarin.ios10. *Not fully supported*</Description>
     <Authors>Microsoft</Authors>
     <Owners>Microsoft, Xamarin</Owners>
     <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>