Describe the bug
toolsDependencie xpack-arm-none-eabi-gcc version 10.3.1-2.3 does not exist.
To Reproduce
Add "https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json" to Arduino IDE board manager urls.
Install version 2.2.0 with the Arduino IDE. It will fail downloading xpack-arm-none-eabi-gcc version 10.3.1-2.3 with status 404.
Expected behavior
An existing version of xpack-arm-none-eabi-gcc is downloaded.
Screenshots

Desktop:
- OS: Windows x64 (Tested also on Intel Mac and Apple Silicon, with latest version of Arduino IDE)
- Arduino IDE version: 1.8.10