Fix stalling after connecting to BLE Server

[JudgeGregg]

Probably a bit late to the party, but in case someone stumbles on this sketch, I managed to get it running on a ESP32-C3 from Seeed. See Issue #1

As per https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/Client/Client.ino:

• I had to connect using a BLEAdvertisedDevice rather than a ServerAddress to get past the « Connected to Server Part »
• Also return true on the function because its result is evaluated in the loop(), and failing to do so results in a crash.