manifest: update zephyr with nrf53 pretick power usage fix

For RTC0 events the RTC1 pretick event was not cleared what caused the
WDT to be not stopped. This resulted in increased power usage.

This commit brings in zephyr with the fix to this issue.

Signed-off-by: Andrzej Kuros <andrzej.kuros@nordicsemi.no>

west.yml

@@ -61,7 +61,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: c7f3aaa87cf8ab6ca6961ec57f06d65d7c893e5b
+      revision: 6b30e02121a9852c98ba0c7600e041da24b2c1fd
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above