Fix package urls

Author: james-d-mitchell

PackageInfo.g

@@ -31,7 +31,6 @@ Persons := [
   rec(
     FirstNames    := "Matthew",
     LastName      := "Pancer",
-    WWWHome       := "?",
     Email         := "[email protected]",
     IsAuthor      := true,
     IsMaintainer  := true,
@@ -44,7 +43,8 @@ Persons := [
 SourceRepository := rec(Type := "git",
                         URL  := "https://github.com/digraphs/graphviz"),
 IssueTrackerURL := "https://github.com/digraphs/graphviz/issues",
-PackageWWWHome  := "TODO",
+PackageWWWHome  := Concatenation("https://digraphs.github.io/",
+                                 ~.PackageName),
 
 PackageInfoURL := Concatenation(~.PackageWWWHome, "PackageInfo.g"),
 README_URL     := Concatenation(~.PackageWWWHome, "README.md"),