manifest: update sdk-zephyr

Include
tests: drivers: retained_mem: Run test on nrf54l20pdk
nrfconnect/sdk-zephyr#2371
zephyrproject-rtos/zephyr#82958

Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>

west.yml

@@ -69,7 +69,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 0f2b574e26e65fcd5aaf0b0758595913c4514527
+      revision: pull/2371/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above