Add submission # 6952

#6952

Author: ArduinoBot

registry.txt

@@ -8398,3 +8398,4 @@ https://github.com/4dsystems/GFX4dESP32P4.git|Contributed|GFX4dESP32P4
 https://github.com/vkumpan/TEA5767.git|Contributed|TEA5767
 https://github.com/DIYables/DIYables-WebApps-Library.git|Contributed|DIYables WebApps
 https://github.com/arduino-libraries/Arduino_APDS9999.git|Arduino|Arduino_APDS9999
+https://github.com/7semi-solutions/7Semi-MCP23017-Arduino-Library.git|Contributed|7Semi_MCP23017