Update README.md

Author: Edzelf

README.md

@@ -3,5 +3,5 @@ Development for LoRa
 
 - RFM95 met D1 mini.docx has a wiring diagram for a LoRa mode bases on a Wemos D1 and a RFM95W tranciever.
 - STM32_LoRa contains an Arduino based sketch for the STM32F103C and a RFM95 that can send data to TTN.
-- ESP_LoRa_Tracker contains a LoRa tracker for an ESP8288 (D1 mini) and an RFM95.
+- ESP_lora_tracker contains a LoRa tracker for an ESP8288 (D1 mini) and an RFM95.