Add a second delay() to get the unit tests running on Rak4631 (#4862)

test/test_crypto/test_main.cpp

@@ -129,6 +129,7 @@ void setup()
 {
     // NOTE!!! Wait for >2 secs
     // if board doesn't support software reset via Serial.DTR/RTS
+    delay(10);
     delay(2000);
 
     UNITY_BEGIN(); // IMPORTANT LINE!