fix rng peripheral versions for STM32H7 series

[hansihe]

The STM32H7[23AB] chips appear to use V2 of the RNG peripheral.

I omitted the STM32H7[RS][37] chips from the config as they seem to use a variation of V3.

Reference manuals to check:

• RM0433 -> V1
• RM0399 -> V1
• RM0468 -> V2
• RM0455 -> V2
• RM0477 -> Vwhat

[embassy-ci[bot]]

diff: https://ci.embassy.dev/jobs/e192e5dbabca/artifacts/diff.html