Merge pull request #328 from arduino/Jorgetrujilloroman/getting-started-rs485-small-fix

[PC-1131] Small word fix

Author: TaddyHC

content/hardware/05.pro-solutions/solutions-and-kits/opta/tutorials/getting-started-with-rs485/content.md

@@ -20,7 +20,7 @@ hardware:
 
 The Opta™ micro PLC offers an easy-to-use and readily-available RS-485 interface. The RS-485 interface provides balanced performance to transmit data reliably over a long distance, with a stable transmission rate. Thanks to the Arduino ecosystem tools, such as the [Arduino IDE](https://www.arduino.cc/en/software) and the [ArduinoRS485 library](https://www.arduino.cc/reference/en/libraries/arduinors485/), it is really easy to implement communication protocols using the RS-485 interface.
 
-This tutorial will show the steps to connect two Opta™ devices via RS-485 and the Arduino ecosystems tools; it will describe some essential functions of the [ArduinoRS485](https://www.arduino.cc/reference/en/libraries/arduinors485/) library and show an [example sketch](assets/Opta_RS485_Example.zip) that uses the library.
+This tutorial will show the steps to connect two Opta™ devices via RS-485 and the Arduino ecosystem tools; it will describe some essential functions of the [ArduinoRS485](https://www.arduino.cc/reference/en/libraries/arduinors485/) library and show an [example sketch](assets/Opta_RS485_Example.zip) that uses the library.
 
 ## Goals