bug/piechart_numbers_overlapping (#2)

- more radius offset for text (922d88d7074219e8d094e2145c96d802c1f8abd2)

app.py

@@ -136,7 +136,7 @@ def donut_chart_target() -> alt.Chart:
 
     c1 = base.mark_arc(innerRadius=20, stroke="#fff")
 
-    c2 = base.mark_text(radiusOffset=10).encode(text="values:Q")
+    c2 = base.mark_text(radiusOffset=20).encode(text="values:Q")
 
     chart = c1 + c2