[meta] add Open Collective

Author: ljharb

.github/FUNDING.yml

@@ -2,7 +2,7 @@
 
 github: [ljharb]
 patreon: # Replace with a single Patreon username
-open_collective: # Replace with a single Open Collective username
+open_collective: eslint-plugin-import # Replace with a single Open Collective username
 ko_fi: # Replace with a single Ko-fi username
 tidelift: npm/eslint-plugin-import
 community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry