Update FUNDING.yml with Ethereum address (#854)

* Update FUNDING.yml

* Update FUNDING.yml

.github/FUNDING.yml

@@ -7,4 +7,4 @@ community_bridge: # Replace with a single Community Bridge project-name e.g., cl
 liberapay: # Replace with a single Liberapay username
 issuehunt: # Replace with a single IssueHunt username
 otechie: # Replace with a single Otechie username
-custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
+custom: ['https://etherscan.io/address/0x6e013395109d1b7Bd941D9E5F6BAE3ee624E63EE'] # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']