Fix: wrong link on FUNDING.yml

Duh... suits me well for failing to *test* the links before submitting them!!

Author: GwynethLlewelyn

.github/FUNDING.yml

@@ -11,5 +11,5 @@
 #otechie: # Replace with a single Otechie username
 #lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
 #custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
-open_collective: Gwyneth Llewelyn
+open_collective: GwynethLlewelyn
 liberapay: GwynethLlewelyn