📚 Fix typo

Author: pmonks

README.md

@@ -14,7 +14,7 @@ Progress indicators for command line Clojure apps, including support for indeter
 
 To give the user of a command line app a visual progress indicator during long running processes.
 
-Here it is in action (from the [demo script](https://github.com/pmonks/spinner/blob/dev/demo.clj):
+Here it is in action (from the [demo script](https://github.com/pmonks/spinner/blob/dev/demo.clj)):
 
 <p align="center">
   <img alt="Spinner example screenshot" src="https://raw.githubusercontent.com/pmonks/spinner/dev/spinner-demo.gif"/>