Update doc/releases/release-notes-4.3.rst

Co-authored-by: Abderahmane <[email protected]>

Author: KozhinovAlexander

doc/releases/release-notes-4.3.rst

@@ -92,13 +92,7 @@ New Drivers
 
 * Interrupt controller
 
-   * :dtcompatible:`st,stm32-exti`
-   * Split STM32 EXTI driver from GPIO driver into a separate driver.
-
-* GPIO
-
-   * :dtcompatible:`st,stm32-gpio`
-   * Integrated STM32 EXTI driver.
+   * STM32 EXTI interrupt/event controller (:dtcompatible:`st,stm32-exti`) has a dedicated driver and API now, separate from STM32 GPIO Interrupt Control driver.
 
 * RTC