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

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

Author: KozhinovAlexander

doc/releases/release-notes-4.3.rst

@@ -102,8 +102,7 @@ New Drivers
 
 * RTC
 
-   * :dtcompatible:`st,stm32-rtc`
-   * Integrated STM32 EXTI driver.
+   * STM32 RTC driver has been updated to use the new STM32 EXTI interrupt controller API
 
 
 New Samples