update changelog

Author: github-actions[bot]

changelog-versions/20.5.0.md

@@ -22,6 +22,10 @@
 - Search field clear action uses wrong iconButton size [#2489](https://github.com/Telefonica/mistica-design/issues/2489)
 - Sheet corner radius uses a fixed value instead of a token [#2492](https://github.com/Telefonica/mistica-design/issues/2492)
 
+## Vivo
+
+- New border radius for Vivo skin [#2480](https://github.com/Telefonica/mistica-design/issues/2480)
+
 ## O<sub>2<sub>
 
 - New Icons for Portin and Portout [#2266](https://github.com/Telefonica/mistica-design/issues/2266)