Fix typo /s/configure/configured

README.md

@@ -272,7 +272,7 @@ Reveal.initialize({
 
 ### Auto-sliding
 
-Presentations can be configure to progress through slides automatically, without any user input. To enable this you will need to tell the framework how many milliseconds it should wait between slides:
+Presentations can be configured to progress through slides automatically, without any user input. To enable this you will need to tell the framework how many milliseconds it should wait between slides:
 
 ```javascript
 // Slide every five seconds