Include release description in the output

Author: Maxime Mangel

src/Ionide.KeepAChangelog.Tasks/Library.fs

@@ -92,8 +92,12 @@ type ParseChangelogs() =
                 sortedReleases
                 |> Seq.tryHead
                 |> Option.iter (fun release ->
-                    release.Data
-                    |> Option.iter (fun data -> this.LatestReleaseNotes <- data.ToMarkdown()))
+                    match release.Description, release.Data with
+                    | Some desc, None -> this.LatestReleaseNotes <- desc
+                    | None, Some data -> this.LatestReleaseNotes <- data.ToMarkdown()
+                    | Some desc, Some data ->
+                        this.LatestReleaseNotes <- $"{desc}{System.Environment.NewLine}{data.ToMarkdown()}"
+                    | None, None -> ())
 
                 true
             | Error(formatted, msg) ->