Fix NuGet package description on target frameworks.

ICSharpCode.AvalonEdit/ICSharpCode.AvalonEdit.csproj

@@ -9,7 +9,7 @@
     <AssemblyOriginatorKeyFile>ICSharpCode.AvalonEdit.snk</AssemblyOriginatorKeyFile>
     <Company>ic#code</Company>
     <Copyright>2000-2021 AlphaSierraPapa for the SharpDevelop Team</Copyright>
-    <Description>AvalonEdit is the WPF-based text editor used in SharpDevelop. There are three builds of AvalonEdit included in this package: .NET 4.0, 4.5 and .NET Core 3.0.</Description>
+    <Description>AvalonEdit is the WPF-based text editor used in SharpDevelop. There are four builds of AvalonEdit included in this package: .NET Framework 4.5 and 4.0, .NET Core 3.1, .NET 5.0 for Windows.</Description>
     <Version>6.1</Version>
     <AssemblyVersion>6.1.0.0</AssemblyVersion>
     <FileVersion>6.1.0.0</FileVersion>