boards: st: fixes for board flashing

[JarmouniA]

Follow-up fixes to PR #75284.

[JarmouniA]

CI is failing here because of tests/drivers/gpio/gpio_basic_api -T drivers.gpio.2pin_arduino on nucleo_wb05kz & nucleo_wb09ke.
@mathieuchopstm could u take a look?

[erwango]

@JarmouniA Here is a fixup to unlock CI and your PR: #78535

[JarmouniA]

Rebased.

[JarmouniA]

Hi @kartben, could you please take a look, thanks!

[kartben]

@JarmouniA @erwango while nucleo_u031r8.jpg, nucleo_u083rc.jpg, and stm32u083c_dk.jpg have been pushed in the repo, they don't seem to be referenced by the respective index.rst files :)

[JarmouniA]

@JarmouniA @erwango while nucleo_u031r8.jpg, nucleo_u083rc.jpg, and stm32u083c_dk.jpg have been pushed in the repo, they don't seem to be referenced by the respective index.rst files :)

#77706 @djiatsaf-st
#76242 #76242 @marwaiehm-st

[djiatsaf-st]

@JarmouniA @erwango while nucleo_u031r8.jpg, nucleo_u083rc.jpg, and stm32u083c_dk.jpg have been pushed in the repo, they don't seem to be referenced by the respective index.rst files :)

#77706 @djiatsaf-st #76242 #76242 @marwaiehm-st

Thank you @kartben for your comment, i will add the references for these 3 images.

[djiatsaf-st]

@JarmouniA @erwango while nucleo_u031r8.jpg, nucleo_u083rc.jpg, and stm32u083c_dk.jpg have been pushed in the repo, they don't seem to be referenced by the respective index.rst files :)

#77706 @djiatsaf-st #76242 #76242 @marwaiehm-st

see : #79565