Update docs link in PR template.

.github/PULL_REQUEST_TEMPLATE.md

@@ -18,7 +18,7 @@
 
 - [ ] Added unit tests (if possible)?
 - [ ] Added XML documentation to any related classes?
-- [ ] Consider submitting a PR to https://github.com/AvaloniaUI/Avaloniaui.net with user documentation
+- [ ] Consider submitting a PR to https://github.com/AvaloniaUI/Documentation with user documentation
 
 ## Breaking changes
 <!--- List any breaking changes here. When the PR is merged please add an entry to https://github.com/AvaloniaUI/Avalonia/wiki/Breaking-Changes -->