Add Arxiv link

Data_Loading.py

@@ -18,7 +18,7 @@ st.markdown(
     """
     # Codebook Creation/Edition Tool based on the PR-ENT Approach.
     ### *Rethinking the Event Coding Pipeline with Prompt Entailment*
-    ### ARXIV LINK HERE
+    ### https://arxiv.org/abs/2210.05257
     ### Clément Lefebvre (Swiss Data Science Center)
     ### Niklas Stoehr (ETH Zürich, https://niklas-stoehr.com/)
     ##### Version: 1.0