Update FUNDING.yml

.github/FUNDING.yml

@@ -2,7 +2,7 @@
 
 github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
 patreon: mattn # Replace with a single Patreon username
-open_collective: # Replace with a single Open Collective username
+open_collective: mattn # Replace with a single Open Collective username
 ko_fi: # Replace with a single Ko-fi username
 tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
 custom: # Replace with a single custom sponsorship URL