Update repositories.txt (arduino#1621)

Author: GyverLibs

repositories.txt

@@ -119,6 +119,7 @@ https://github.com/bolderflight/leb128
 https://github.com/bolderflight/framing
 https://github.com/bolderflight/checksum
 https://github.com/bolderflight/airdata
+https://github.com/GyverLibs/VirtualButton
 https://github.com/GyverLibs/CharDisplay
 https://github.com/GyverLibs/GyverNTP
 https://github.com/GyverLibs/GyverJoy