Update java-champions.yml

Author: johanjanssen

java-champions.yml

@@ -1820,7 +1820,7 @@ members:
       twitter: https://twitter.com/gracejansen27
       linkedin: https://www.linkedin.com/in/grace-jansen/
     avatar: img/avatars/gracejansen27.png
-  - name: Johan Jansen
+  - name: Johan Janssen
     year: 2024
     country:
       nomination: The Netherlands