Update some 4.5.2 references to 4.6.2

Issue #4433

.vsconfig

@@ -10,7 +10,7 @@
     "Microsoft.Net.ComponentGroup.DevelopmentPrerequisites",
     "Microsoft.Component.MSBuild",
     "Microsoft.VisualStudio.Component.ManagedDesktop.Core",
-    "Microsoft.Net.Component.4.5.2.TargetingPack",
+    "Microsoft.Net.Component.4.6.2.TargetingPack",
     "Microsoft.VisualStudio.Component.IntelliCode",
     "Microsoft.Net.ComponentGroup.TargetingPacks.Common",
     "Microsoft.VisualStudio.Component.Debugger.JustInTime",

CefSharp.shfbproj

@@ -13,7 +13,7 @@
     <RootNamespace>Documentation</RootNamespace>
     <Name>Documentation</Name>
     <!-- SHFB properties -->
-    <FrameworkVersion>.NET Framework 4.5.2</FrameworkVersion>
+    <FrameworkVersion>.NET Framework 4.6.2</FrameworkVersion>
     <OutputPath>.\Help\</OutputPath>
     <HtmlHelpName>Documentation</HtmlHelpName>
     <Language>en-US</Language>