G491 variants has wrongly defined 128kB RAM instead if 112k

[novaksta]

Hello,

the G491 variants have wrongly defined .upload.maximum_data_size parameter in boards.txt -- should be 114688 (112k, according to datasheet; not 128k as G47xs).

Thanks.

[fpistm]

Hi @novaksta
Thanks for the issue. It seems you're right.
The RAM entry is extracted from xml file description available within STM32CubeMX database. The RAM size is wrong in G491 files.
Ex:
https://github.com/STMicroelectronics/STM32_open_pin_data/blob/3d64b1076ac7f0bf0f74acf89b9578b530f37ed7/mcu/STM32G491RETxZ.xml#L6C13-L6C14

Could you provide a PR for this, please?