Fix syntax error

Author: thomas-kl1

.github/FUNDING.yml

@@ -9,4 +9,5 @@ patreon: thomas_klein # Replace with a single Patreon username
 #liberapay: # Replace with a single Liberapay username
 #issuehunt: # Replace with a single IssueHunt username
 #otechie: # Replace with a single Otechie username
-custom: ['https://paypal.me/thomaskl1']# Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
+custom: ['https://paypal.me/thomaskl1']
+# Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']