bench: reduce array size

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

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/dvander/benchmark/c/benchmark.length.c

@@ -28,7 +28,7 @@
 #define ITERATIONS 1000000
 #define REPEATS 3
 #define MIN 1
-#define MAX 6
+#define MAX 3
 
 /**
 * Prints the TAP version.