[nrf fromtree] doc boards nrfbsim: Mention the UARTE as supported for nrf54l15

Include in the list of supported peripherals the UARTE for the
simulated nrf54l15

Signed-off-by: Alberto Escolar Piedras <[email protected]>
(cherry picked from commit 890f134)

Author: aescolar

boards/native/nrf_bsim/doc/nrf54l15bsim.rst

@@ -50,6 +50,7 @@ This boards include models of some of the nRF54L15 SOC peripherals:
 * RTC (Real Time Counter)
 * TEMP (Temperature sensor)
 * TIMER
+* UARTE (UART with Easy DMA)
 * UICR (User Information Configuration Registers)
 
 and will use the same drivers as the nrf54l15dk targets for these.