update Translation section

Author: fkwp

README.md

@@ -135,7 +135,8 @@ selection for **Matrix rooms 123 and 456**, which include users from different
 homeservers.  
 ![Element Call SFU selection over Matrix federation](./docs/SFU_selection.drawio.png)
 
-## Translation
+
+## 🌍 Translation
 
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