Update GitHub scraping example in GUIDE.md

[JosXa]

Was trying out the example, seems the span is required to get to the anchor now.

Without:

[2024-01-11 22:32:22.571] [info]  []

With:

[2024-01-11 22:33:35.211] [info]  [{"link":"https://github.com/johnlindquist/kit","title":"kit"},{"link":"https://github.com/johnlindquist/angularjs-plugin","title":"angularjs-plugin"},{"link":"https://github.com/johnlindquist/react-streams","title":"react-streams"},{"link":"https://github.com/johnlindquist/angular-resolve","title":"angular-resolve"},{"link":"https://github.com/johnlindquist/rx-handler","title":"rx-handler"},{"link":"https://github.com/johnlindquist/intro-to-angular2","title":"intro-to-angular2"}]

[JosXa]

It's approved. Merge too?