Update FUNDING.yml

Author: KercX

.github/FUNDING.yml

@@ -1,7 +1,7 @@
 github: KercX
 patreon: javabooks
-open_collective: javabooksCO
-ko_fi: javabooksCO
+open_collective: JavaBOOKSCO
+ko_fi: javabooksCOI
 custom:
   - https://buymeacoffee.com/javabooks
   - https://donate.javabooks.com