Remove Tidelift and add OpenCollective

Author: jeromewu

.github/FUNDING.yml

@@ -2,9 +2,9 @@
 
 github: [jeromewu]# Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
 patreon: # Replace with a single Patreon username
-open_collective: # Replace with a single Open Collective username
+open_collective: ffmpegwasm
 ko_fi: # Replace with a single Ko-fi username
-tidelift: "npm/@ffmpeg/ffmpeg"
+tidelift: # Remove
 community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
 liberapay: # Replace with a single Liberapay username
 issuehunt: # Replace with a single IssueHunt username