Update README.md

README.md

@@ -36,7 +36,7 @@ citation: >-
 
 [MolData](https://jcheminf.biomedcentral.com/articles/10.1186/s13321-022-00590-y) is a comprehensive disease and target-based dataset collected from PubChem.
 The dataset contains 1.4 million unique molecules, and it is one the largest efforts to date for democratizing the molecular machine learning.
-This is a mirror of the [Official Github repo](https://github.com/LumosBio/MolData/tree/main/Data) which the dataset was uploaded in 2021.
+This is a mirror of the [Official Github repo](https://github.com/LumosBio/MolData/tree/main/Data) where the dataset was uploaded in 2021.
 
 
 ## Preprocessing