Fix typo with word programatically

Author: Dan Caddigan

README.md

@@ -216,7 +216,7 @@
       'fast.';
     ```
 
-  - When programatically building up a string, use Array#join instead of string concatenation. Mostly for IE: [jsPerf](http://jsperf.com/string-vs-array-concat/2).
+  - When programmatically building up a string, use Array#join instead of string concatenation. Mostly for IE: [jsPerf](http://jsperf.com/string-vs-array-concat/2).
 
     ```javascript
     var items,