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

@@ -487,6 +487,12 @@ xSPI
   Note that the property gives the actual size of the memory device in bits.
   Previous mapping address information is now described in xspi node at SoC dtsi level.
 
+Video
+=====
+
+* 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+  property has been replaced by the usage of the frame interval (frmival) API.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
 ****************