doc: releases: add note regarding dcmi binding update

Add note regarding the move of the video/dcmi driver
to the usage of endpoint based video-interfaces
bindings.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>

Author: Alain Volmat

doc/releases/migration-guide-4.2.rst

@@ -501,6 +501,10 @@ Video
   ``VIDEO_PIX_FMT_GRBG8`` becomes ``VIDEO_PIX_FMT_SGRBG8``
   ``VIDEO_PIX_FMT_RGGB8`` becomes ``VIDEO_PIX_FMT_SRGGB8``
 
+* On STM32 devices, the DCMI driver now relies on endpoint based video-interfaces.yaml bindings
+  for sensor interface properties (such as bus width and synchronization signals). The capture-rate
+  property has been replaced by the usage of the frame interval (frmival) API.
+
 Other subsystems
 ****************