fix: add missing method name in little-endian-factory benchmark

The benchmark name format string was missing the :of: method name
segment. Changed '%s:len=5' to '%s:of:len=5' to match the convention
used by the first benchmark in the same file and other factory
benchmarks.

Closes #11151

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mvanhorn

lib/node_modules/@stdlib/array/little-endian-factory/benchmark/benchmark.of.js

@@ -52,7 +52,7 @@ bench( format( '%s:of', pkg ), function benchmark( b ) {
 	b.end();
 });
 
-bench( format( '%s:len=5', pkg ), function benchmark( b ) {
+bench( format( '%s:of:len=5', pkg ), function benchmark( b ) {
 	var buf;
 	var arr;
 	var i;