Update README.md

The direct link to the original dataset file: https://archive.ics.uci.edu/ml/machine-learning-databases/00462/drugsCom_raw.zip
This dataset was changed a little bit as data preprocessing for further training

README.md

@@ -1,3 +1,11 @@
----
-license: apache-2.0
----
+---
+license: apache-2.0
+task_categories:
+- summarization
+- text-classification
+language:
+- en
+tags:
+- medical
+pretty_name: DRD
+---