fix: correct formatting in example documentation for variancech

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Author: gururaj1512

lib/node_modules/@stdlib/stats/base/variancech/lib/index.js

@@ -31,7 +31,7 @@
 * var v = variancech( x.length, 1, x, 1 );
 * // returns ~4.3333
 *
-* @example\
+* @example
 * var variancech = require( '@stdlib/stats/base/variancech' );
 *
 * var x = [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0 ];