Fixed orderby evaluation

Had used Value twice instead of Key for the second part.

Author: Redth

source/buildtasks/support-annotations/VerifyVersionsTask.cs

@@ -85,7 +85,7 @@ public override bool Execute()
 
 				var recommendedSupportVersion = NugetPackages.GetRecommendedSupportPackageVersion(apiLevel);
 
-				foreach (var pkg in packageVersions.OrderBy(p => p.Value + "-" + p.Value))
+				foreach (var pkg in packageVersions.OrderBy(p => p.Value + "-" + p.Key))
 					sb.AppendLine($"    {pkg.Key} ({pkg.Value})");
 
 				sb.AppendLine();