cmt2300a no longer hardcoded to SPI bus 2

docs/hardware/cmt2300a.md

@@ -12,7 +12,10 @@
 
 The CMT2300A module is a 868MHz RF module. It is important to get a module which supports SPI communication. Currently only the [EBYTE E49-900M20S](https://www.ebyte.com/en/pdf-down.aspx?id=2506){target=_blank} is supported as a standalone module, or use the [OpenDTU Fusion PCB](../3rd_party/opendtu_fusion.md) instead.
 
-The CMT2300A uses 3-Wire half duplex SPI communication. Due to this fact it currently requires a separate SPI bus. If you want to run the CMT2300A module on the same ESP32 as a NRF24L01+ module or a PCD8544 display make sure you get an ESP32 which supports 2 SPI busses. **Currently the SPI bus for the CMT2300A is hardcoded to number 2** (this will change in the future). The current limitation of the ESP32's two SPI busses makes some combinations of hardware (HMS Series Inverter and Huawei AC charger) impossible to use.
+The CMT2300A uses 3-Wire half duplex SPI communication. Due to this fact it
+currently requires a separate SPI bus. If you want to run the CMT2300A module
+on the same ESP32 as a NRF24L01+ module or a PCD8544 display make sure you get
+an ESP32 which supports 2 SPI busses (use an ESP32-S3).
 
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