update benchmark.length.c

Signed-off-by: Sachin Pangal <151670745+Sachinn-64@users.noreply.github.com>

Author: Sachinn-64

lib/node_modules/@stdlib/stats/base/ndarray/dmidrange/benchmark/c/benchmark.length.c

@@ -50,7 +50,7 @@ static void print_version( void ) {
 */
 static void print_summary( int total, int passing ) {
 	printf( "#\n" );
-	printf( "1..%d\n", total );
+	printf( "1..%d\n", total ); // TAP plan
 	printf( "# total %d\n", total );
 	printf( "# pass  %d\n", passing );
 	printf( "#\n" );