fixup update ref paths

Author: siegfriedpammer

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -276,8 +276,8 @@ private static string ReplacePrivImplDetails(string il)
 		}
 
 		static readonly string coreRefAsmPath = new DotNetCorePathFinder(TargetFrameworkIdentifier.NET,
-			new Version(8, 0), "Microsoft.NETCore.App")
-				.GetReferenceAssemblyPath(".NETCoreApp,Version=v8.0");
+			new Version(10, 0), "Microsoft.NETCore.App")
+				.GetReferenceAssemblyPath(".NETCoreApp,Version=v10.0");
 
 		public static readonly string RefAsmPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFilesX86),
 			@"Reference Assemblies\Microsoft\Framework\.NETFramework\v4.7.2");
@@ -315,7 +315,7 @@ private static string ReplacePrivImplDetails(string il)
 
 		const string targetFrameworkAttributeSnippet = @"
 
-[assembly: System.Runtime.Versioning.TargetFramework("".NETCoreApp,Version=v8.0"", FrameworkDisplayName = """")]
+[assembly: System.Runtime.Versioning.TargetFramework("".NETCoreApp,Version=v10.0"", FrameworkDisplayName = """")]
 
 ";