Fix variable name

Author: kgryte

lib/node_modules/@stdlib/time/toc/README.md

@@ -15,7 +15,7 @@ var toc = require( '@stdlib/time/toc' );
 Returns a high-resolution time difference, where `time` is a two-element `array` with format `[seconds, nanoseconds]`.
 
 ```javascript
-var delta = tic( [ 100, 123456789 ] );
+var delta = toc( [ 100, 123456789 ] );
 // returns [<number>,<number>]
 ```