Bump version and add .NET 9 target

Author: neon-nyan

ZstdNet/ZstdNet.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<Version>1.6.2</Version>
-		<TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0</TargetFrameworks>
+		<Version>1.6.3</Version>
+		<TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
 		<Title>ZstdNet</Title>
 		<PackageId>Hi3Helper.ZstdNet</PackageId>
 		<Company>SKB Kontur, Collapse Project Team</Company>