add my library link to the repositories.txt (#5488)

to line 7545, I added the link shown below.

```
https://github.com/53175ddd/AY-3-8910_Arduino
```

Author: 53175ddd

repositories.txt

@@ -7542,3 +7542,4 @@ https://github.com/DMT-Services/GeoMagnetism
 https://github.com/ConsentiumIoT/ConsentiumStarterKit
 https://github.com/batuhantrkgl/ESP8266-D1_SMTPClient
 https://github.com/technochicken/SmartSW
+https://github.com/53175ddd/AY-3-8910_Arduino