Remove references to Arduino SA

Remove references to Arduino SA, as I cannot find anywhere where Arduino themselves use that term - they seem to be a somewhat nebulous grouping of companies (I can find references to at least Inc, Srl and SA), so its probably for the best to just call them Arduino rather than risk using the wrong legal entity name.

Author: Alarm-Siren

README.md

@@ -63,13 +63,13 @@ Except as otherwise noted, all content of this library is licensed under the
 
 The two images "resources/banner.png" and "resources/icon.png" are are licensed under the [Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-nc-sa/4.0/). These images are derivatives of ["Arduino Open-Source Community: Main Logotype RGB Colors" originally created by Arduino](https://www.arduino.cc/en/trademark/community-logo). 
 
-Original Images: Copyright 2013, [Arduino SA](https://www.arduino.cc/). Derived Images: Copyright 2023, [Nicholas Parks Young](https://github.com/Alarm-Siren).
+Original Images: Copyright 2013, [Arduino](https://www.arduino.cc/). Derived Images: Copyright 2023, [Nicholas Parks Young](https://github.com/Alarm-Siren).
 
 [![CC BY-SA-NC 4.0](https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png)](https://creativecommons.org/licenses/by-nc-sa/4.0/)
 
 ### Arduino Trademark
 
-The word "Arduino" is a registered trademark of Arduino SA. This trademark is used in this library to refer to Arduino products and to identify Arduino-related non-commercial content, as permitted by Arduino's [trademark guidelines](https://www.arduino.cc/en/trademark). This project is not affiliated with nor endorsed by Arduino.
+The word "Arduino" is a registered trademark of [Arduino](https://www.arduino.cc/). This trademark is used in this library to refer to Arduino products and to identify Arduino-related non-commercial content, as permitted by Arduino's [trademark guidelines](https://www.arduino.cc/en/trademark). This project is not affiliated with nor endorsed by Arduino.
 
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