doc: release-notes-4.0: Add camera colorbar pattern test

This is added via PRs #79337 and #79263 to automatically check if a
colorbar pattern generated by a camera pipeline is correct or not.

Signed-off-by: Phi Bang Nguyen <[email protected]>

Author: ngphibang

doc/releases/release-notes-4.0.rst

@@ -742,6 +742,7 @@ Drivers and Sensors
   * Introduced missing :kconfig:option:`CONFIG_VIDEO_LOG_LEVEL`
   * Added a sample for capturing video and displaying it with LVGL
     (:zephyr:code-sample:`video-capture-to-lvgl`)
+  * Added an automatic test to check colorbar pattern correctness
   * Added support for GalaxyCore GC2145 image sensor (:dtcompatible:`gc,gc2145`)
   * Added support for ESP32-S3 LCD-CAM interface (:dtcompatible:`espressif,esp32-lcd-cam`)
   * Added support for NXP MCUX SMARTDMA interface (:dtcompatible:`nxp,smartdma`)