update README for the stm32wl after changing LL_PLL_ConfigSystemClock_MSI

after merge of the

(cherry picked from commit ab42f7015e16500db4a51ba562eee36460b7473e)

https://github.com/zephyrproject-rtos/hal_stm32/pull/133/
Signed-off-by: Francois Ramu <francois.ramu@st.com>
GitOrigin-RevId: ab42f7015e16500db4a51ba562eee36460b7473e
Change-Id: I330d52b6413fa45dd24745cd328f0bba68f825a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/hal_stm32/+/3518091
Tested-by: CopyBot Service Account <copybot.service@gmail.com>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
1 file changed