Update FUNDING.yml

Author: AnupKumarPanwar

.github/FUNDING.yml

@@ -9,4 +9,4 @@ community_bridge: # Replace with a single Community Bridge project-name e.g., cl
 liberapay: TheAlgorithms
 issuehunt: # Replace with a single IssueHunt username
 otechie: # Replace with a single Otechie username
-custom: ['http://paypal.me/TheAlgorithms/1000']
+custom: ['http://paypal.me/TheAlgorithms/1000', 'https://donorbox.org/thealgorithms']