Update README to link to dbt-core url

README.md

@@ -11,7 +11,7 @@
 
 `dbt-score` is a linter for dbt model metadata.
 
-[dbt](https://getdbt.com/) (Data Build Tool) is a great framework for creating,
+[dbt][dbt] (Data Build Tool) is a great framework for creating,
 building, organizing, testing and documenting _data models_, i.e. data sets
 living in a database or a data warehouse. Through a declarative approach, it
 allows data practitioners to build data with a methodology inspired by software
@@ -31,10 +31,16 @@ and enforce metadata rules, in an easy and scalable manner.
 ## Documentation
 
 Everything you need (and more) can be found in
-[`dbt-score` documentation website](https://dbt-score.picnic.tech/).
+[`dbt-score` documentation website][dbt-score].
 
 ## Contributing
 
 Would you like to contribute to `dbt-score`? That's great news! Please follow
-[the guide on the documentation website](https://dbt-score.picnic.tech/contributors_guide).
+[the guide on the documentation website][contributors-guide].
 🚀
+
+[dbt]: https://github.com/dbt-labs/dbt-core
+
+[dbt-score]: https://dbt-score.picnic.tech/
+
+[contributors-guide]: https://dbt-score.picnic.tech/contributors_guide