refact: reduce slow-down time before stop

controller/controller.ino

@@ -234,10 +234,10 @@ void StopMotor(int old_esc_val) {
     Serial.println("[INFO] MOTOR STOP INITIATED");
 
     if (old_esc_val > gMIN_ESC_VAL) {
-        Serial.println("[INFO] Slowing down motor for 5 sec...");
+        Serial.println("[INFO] Slowing down motor for 3 sec...");
         gEsc1.write(gMIN_ESC_VAL);
         gEsc2.write(gMIN_ESC_VAL);
-        delay(5000);
+        delay(3000);
     }
 
     gEsc1.write(0);