Update README.md

add paper and citation

README.md

@@ -9,6 +9,8 @@ tags:
 - token-classification
 - sequence-classification
 license: apache-2.0
+citation: "Abdelmageed, N., Löffler, F., & König-Ries, B. (2023). BiodivBERT: a Pre-Trained Language Model for the Biodiversity Domain."
+paper: https://ceur-ws.org/Vol-3415/paper-7.pdf
 metrics:
 - f1
 - precision