Tweak markup

Author: bbatsov

README.md

@@ -22,7 +22,7 @@ support for interacting with a running Clojure process for compilation, code
 completion, debugging, definition and documentation lookup, running tests and so
 on.
 
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+-----------
 [![OpenCollective](https://opencollective.com/cider/backers/badge.svg)](#open-collective-backers)
 [![OpenCollective](https://opencollective.com/cider/sponsors/badge.svg)](#open-collective-sponsors)
 [![Patreon](https://img.shields.io/badge/patreon-donate-orange.svg)](https://www.patreon.com/bbatsov)