provide a meaningful package link (#2841)

This is what gets bound to the 'More Information' link in Visual Studio.

vsintegration/Vsix/VisualFSharpFull/Source.extension.vsixmanifest

@@ -6,6 +6,7 @@
     <DisplayName>Visual F# Tools</DisplayName>
     <Description xml:space="preserve">Deploy Visual F# Tools templates to Visual Studio</Description>
     <PackageId>Microsoft.FSharp.VSIX.Full.Core</PackageId>
+    <MoreInfo>https://docs.microsoft.com/en-us/dotnet/articles/fsharp/</MoreInfo>
   </Metadata>
   <Installation Experimental="true">
     <InstallationTarget Id="Microsoft.VisualStudio.Pro" Version="[15.0]" />
@@ -66,4 +67,4 @@
   <Prerequisites>
     <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[15.0,16.0)" DisplayName="Visual Studio core editor" /> 
   </Prerequisites>
-</PackageManifest>
\ No newline at end of file
+</PackageManifest>

vsintegration/Vsix/VisualFSharpOpenSource/Source.extension.vsixmanifest

@@ -6,6 +6,7 @@
     <DisplayName>Visual F# Tools</DisplayName>
     <Description xml:space="preserve">Deploy Visual F# Tools templates to Visual Studio</Description>
     <PackageId>Microsoft.FSharp.VSIX.OpenSource.Core</PackageId>
+    <MoreInfo>https://docs.microsoft.com/en-us/dotnet/articles/fsharp/</MoreInfo>
   </Metadata>
   <Installation Experimental="true">
     <InstallationTarget Id="Microsoft.VisualStudio.Pro" Version="[15.0]" />
@@ -66,4 +67,4 @@
   <Prerequisites>
     <Prerequisite Id="Microsoft.VisualStudio.Component.CoreEditor" Version="[15.0,16.0)" DisplayName="Visual Studio core editor" />
   </Prerequisites>
-</PackageManifest>
\ No newline at end of file
+</PackageManifest>