fix: url to GitHub pages

Author: sergey-tihon

Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Authors>FSharp.TypeProviders.SDK contributors</Authors>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
-    <PackageProjectUrl>https://github.com/fsprojects/FSharp.TypeProviders.SDK#the-f-type-provider-sdk</PackageProjectUrl>
+    <PackageProjectUrl>https://fsprojects.github.io/FSharp.TypeProviders.SDK/</PackageProjectUrl>
     <RepositoryUrl>https://github.com/fsprojects/FSharp.TypeProviders.SDK</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <Copyright>Copyright 2020 FSharp.TypeProviders.SDK contributors</Copyright>