bench: fix description

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/stats/base/dists/triangular/logpdf/benchmark/benchmark.js

@@ -68,7 +68,7 @@ bench( pkg, function benchmark( b ) {
 	b.end();
 });
 
-bench( format( '%s:factory', pkg ), function benchmark( b ) {
+bench( format( '%s::factory', pkg ), function benchmark( b ) {
 	var mylogpdf;
 	var mode;
 	var min;