[RFXCOM] Lack of support for Apple Silicon Mac

[Rockertier]

The RFXCOM binding does not support Apple Silicon macOS (aarch64 / ARM), only x86_64.

After starting openhab 5.1.1, I get the following error message:

10:58:02.151 [ERROR] [.internal.handler.RFXComBridgeHandler] - Error occurred when trying to load native library for OS 'Mac OS X' version '26.2', processor 'aarch64'