[v3] Convert relative v3 links to absolute links

Author: ErikSchierboom

reference/implementing-a-concept-exercise.md

@@ -79,8 +79,8 @@ If you have any questions regarding implementing the exercise, please post them
 [implemented-exercises]: https://github.com/exercism/v3/blob/master/languages/cpp/exercises/concept/README.md#implemented-exercises
 [meta-design]: https://github.com/exercism/v3/blob/master/languages/cpp/exercises/concept/strings/.meta/design.md
 [meta-config-json]: https://github.com/exercism/v3/blob/master/languages/cpp/exercises/concept/strings/.meta/config.json
-[docs-concept-exercises]: ../../../docs/concept-exercises.md
-[docs-rationale-for-v3]: ../../../docs/rationale-for-v3.md
-[docs-features-of-v3]: ../../../docs/features-of-v3.md
+[docs-concept-exercises]: https://github.com/exercism/v3/blob/main/docs/concept-exercises.md
+[docs-rationale-for-v3]: https://github.com/exercism/v3/blob/main/docs/rationale-for-v3.md
+[docs-features-of-v3]: https://github.com/exercism/v3/blob/main/docs/features-of-v3.md
 [anatomy-of-a-concept-exercise]: https://www.youtube.com/watch?v=gkbBqd7hPrA
-[how-to-implement-a-concept-exercise]: ../../../docs/maintainers/generic-how-to-implement-a-concept-exercise.md
+[how-to-implement-a-concept-exercise]: https://github.com/exercism/v3/blob/main/docs/maintainers/generic-how-to-implement-a-concept-exercise.md