style: replace raw ps aux with filtered and sorted process list in print_load

dot.c

@@ -18,7 +18,7 @@ void print_load() {
         return;
     }
     if(loadavg[0] > 2.0){
-        int result = system("ps aux");
+        int result = system("ps aux | awk '$3 > 1.0' | sort -k3 -nr");
         (void)result;
     }
     printf("%.2f %.2f %.2f", loadavg[0], loadavg[1], loadavg[2]);