[GS] Added sleep to entrypoint

Added a sleep to the entrypoint before starting modules.
This should fix a problem with the VN300 seen as not initialized

src/entrypoints/Groundstation/lyra-gs-entry.cpp

@@ -209,6 +209,10 @@ int main()
 
     // Start the modules
 
+    ledOn();
+    Thread::sleep(2000);
+    ledOff();
+
     // ARP start errors
     bool init_fatal = false;