Updated BaseUrl to v4 for sitemap.xml creation.

Author: boblodgett

buildtools/doc-build.proj

@@ -71,7 +71,7 @@
     <Target Name="create-sitemap" AfterTargets="doc-build" Condition="Exists('$(InternalBuildTools)\references.targets')">
         <CreateSitemapTask
             SourceFolder="$(DocOutputRoot)"
-            BaseUrl="http://docs.aws.amazon.com/sdkfornet/v3/apidocs/"
+            BaseUrl="http://docs.aws.amazon.com/sdkfornet/v4/apidocs/"
             OutputFile="$(DocOutputRoot)\sitemap.xml" />
     </Target>