Update repositories.txt (#4731)

grmrgecko · web-flow · commit 1fe4ae12ebc8 · 2024-07-02T00:41:52.000Z
Adds my simple command line library.
diff --git a/repositories.txt b/repositories.txt
@@ -7134,3 +7134,4 @@ https://github.com/Meli0609/I0Servo
 https://github.com/Freenove/Freenove_IR_Lib_for_ESP32
 https://github.com/DerWaldi/Tiny-I2C-Drivers
 https://github.com/bayeggex/Arduino-AI-Chat-Library
+https://github.com/GRMrGecko/cmd
