Update README.md

Author: neesjanvaneck

README.md

@@ -4,4 +4,6 @@ This repository contains the source code used by [CWTS](https://www.cwts.nl) to
 
 The source code produces a Microsoft SQL Server database that contains (1) data about the universities included in the Leiden Ranking Open Edition and the links between these universities and their affiliated organizations, (2) data about the publications included in the Leiden Ranking Open Edition and the links between these publications and universities and main fields, (3) indicators at the level of publications, and (4) indicators at the level of universities and main fields.
 
+See [this blog post](https://www.leidenmadtrics.nl/articles/introducing-the-leiden-ranking-open-edition) for more information about the Leiden Ranking Open Edition.
+
 This repository makes use of the [CWTS OpenAlex databases](https://github.com/CWTSLeiden/CWTS-OpenAlex-databases) repository.