Update funding.yml

Author: Michal Zobec

.github/funding.yml

@@ -1,12 +1,4 @@
 # These are supported funding model platforms
 
 github: michalzobec
-# 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
-# tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
-# 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
-# otechie: # Replace with a single Otechie username
-# custom: ['https://www.paypal.me/tglatzer']
+custom: ['https://github.com/sponsors/michalzobec']