Update README.md

Author: okdistribute

README.md

@@ -24,7 +24,7 @@ Have questions? Join our chat via IRC or Gitter:
 [![datproject/discussions][gitter-badge]][gitter-chat]
 
 ### Thanks to our financial supporters!
-[![OpenCollective](https://opencollective.com/dat/tiers/maintainer.svg?avatarHeight=36&width=600")]]
+![OpenCollective](https://opencollective.com/dat/tiers/maintainer.svg?avatarHeight=36&width=600")
 
 ### Table of Contents