Fix path to logo

README.md

@@ -153,7 +153,7 @@ We accept donations via [Patreon](https://www.patreon.com/jcbrand) and [Liberapa
 
 ## Sponsors
 
-![Blokt Crypto & Privacy](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/blokt.png)
-![Codefirst](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/codefirst.png)
-![KeyCDN](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/keycdn.png)
-![Mailbox](https://raw.githubusercontent.com/conversejs/converse.js/logo/mailbox.svg)
+* ![Blokt Crypto & Privacy](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/blokt.png)
+* ![Codefirst](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/codefirst.png)
+* ![KeyCDN](https://raw.githubusercontent.com/conversejs/converse.js/541613d1fea8aef364af00180f60e959162e5e4b/logo/keycdn.png)
+* ![Mailbox](https://raw.githubusercontent.com/conversejs/converse.js/master/logo/mailbox.svg)