esp32/README: Updated readme with req IDF vers for ESP32-S2, C3 and S3.

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Seon Rozenblum 2021-09-20 11:34:52 +10:00 committed by Damien George
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@ -75,6 +75,12 @@ $ source export.sh # (or export.bat on Windows)
The `install.sh` step only needs to be done once. You will need to source
`export.sh` for every new session.
**Note:** If you are building MicroPython for the ESP32-S2, ESP32-C3 or ESP32-S3,
please ensure you are using the following required IDF versions:
- ESP32-S3 currently requires latest `master`, but eventually `v4.4` or later when
it's available.
- ESP32-S2 and ESP32-C3 require `v4.3.1` or later.
Building the firmware
---------------------