Update FUNDING.yml

.github/FUNDING.yml

@@ -10,6 +10,6 @@ github: RobinTail # Replace with up to 4 GitHub Sponsors-enabled usernames e.g.,
 # issuehunt: # Replace with a single IssueHunt username
 # lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
 # polar: # Replace with a single Polar username
-# buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
+buy_me_a_coffee: robintail # Replace with a single Buy Me a Coffee username
 # thanks_dev: # Replace with a single thanks.dev username
 # custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']