Update FUNDING.yml

.github/FUNDING.yml

@@ -1,6 +1,7 @@
 # These are supported funding model platforms
 
 github: [mayank1513] # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+polar: mayank1513
 patreon: # Replace with a single Patreon username
 open_collective: # Replace with a single Open Collective username
 ko_fi: # Replace with a single Ko-fi username