boards: st: nucleo_h7s3l8: Fix format in doc/index.rst
Fix wrong heading type in index.rst introduced with PR #95388
Signed-off-by: Thomas Decker <decker@jb-lighting.de>
diff --git a/boards/st/nucleo_h7s3l8/doc/index.rst b/boards/st/nucleo_h7s3l8/doc/index.rst
index 16dcd1e..84562d6 100644
--- a/boards/st/nucleo_h7s3l8/doc/index.rst
+++ b/boards/st/nucleo_h7s3l8/doc/index.rst
@@ -184,7 +184,7 @@
do it by removing ``SB13`` jumper on the back side of the board.
FDCAN
-=====
+-----
The Nucleo H7S3L8 board does not have any onboard CAN transceiver. In order to
use the FDCAN bus on this board, an external CAN bus transceiver must be
