update changelog

Author: github-actions[bot]

changelog-versions/15.3.0.md

@@ -22,10 +22,18 @@
 - Tag missing font family token on Figma [#1948](https://github.com/Telefonica/mistica-design/issues/1948)
 - Wrong stack in display media card in Figma [#1952](https://github.com/Telefonica/mistica-design/issues/1952)
 
+## Vivo
+
+- Vivo-type medium weight [#1839](https://github.com/Telefonica/mistica-design/issues/1839)
+
 ## O<sub>2<sub>
 
 - floppy-disk for o2 style [#1956](https://github.com/Telefonica/mistica-design/issues/1956)
 
 ## ⚙️ Icon changes
 
 - floppy-disk for o2 style [#1956](https://github.com/Telefonica/mistica-design/issues/1956)
+
+## ✒️ Typography changes
+
+- Vivo-type medium weight [#1839](https://github.com/Telefonica/mistica-design/issues/1839)