Update app.py

app.py

@@ -19,6 +19,7 @@ st.markdown(
     <link href="https://fonts.googleapis.com/css2?family=Permanent+Marker&display=swap" rel="stylesheet">
     <style>
     .title {
+        font-family: 'Arial';
         font-size: 2.0rem;
     }
     </style>""",
@@ -115,7 +116,7 @@ fig = px.scatter(
     y="y",
     opacity=DF["opacity"],
     color=DF["cluster"],
-    animation_frame=DF["year"]
+    animation_frame=DF["year"],
     width=1000,
     height=800,
     custom_data=("title", "authors_trimmed", "year"),