Change custom funding link format in FUNDING.yml

Author: elytrya

.github/FUNDING.yml

@@ -12,4 +12,4 @@ lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cl
 polar: # Replace with a single Polar username
 buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
 thanks_dev: # Replace with a single thanks.dev username
-custom: https://boosty.to/onevanilamc
+custom: ['https://boosty.to/onevanilamc']