doc: Update redirects.py to find the correct README

1. Update redirects.py to find the correct mimxrt595_evk
system_off example README.
2. Update release-notes to record the new nxp poweroff
example.

Signed-off-by: Zhaoxiang Jin <[email protected]>

Author: ZhaoxiangJin

doc/_scripts/redirects.py

@@ -253,8 +253,7 @@
     ('samples/boards/mec15xxevb_assy6853/power_management/README', 'samples/boards/microchip/mec15xxevb_assy6853/power_management/README'),
     ('samples/boards/mimxrt1060_evk/system_off/README', 'samples/boards/nxp/mimxrt1060_evk/system_off/README'),
     ('samples/boards/mimxrt1170_evk_cm7/magic_addr/README', 'samples/boards/nxp/mimxrt1170_evk_cm7/magic_addr/README'),
-    ('samples/boards/mimxrt595_evk/system_off/README', 'samples/boards/nxp/mimxrt595_evk/system_off/README'),
-    ('samples/boards/nrf/battery/README', 'samples/boards/nordic/battery/README'),
+    ('samples/boards/mimxrt595_evk/system_off/README', 'samples/boards/nxp/poweroff/README'),
     ('samples/boards/nrf/clock_skew/README', 'samples/boards/nordic/clock_skew/README'),
     ('samples/boards/nrf/dynamic_pinctrl/README', 'samples/boards/nordic/dynamic_pinctrl/README'),
     ('samples/boards/nrf/ieee802154/802154_rpmsg/README', 'samples/boards/nordic/ieee802154/802154_rpmsg/README'),

doc/releases/release-notes-4.3.rst

@@ -90,6 +90,8 @@ New Samples
   Same as above for boards and drivers, this will also be recomputed at the time of the release.
  Just link the sample, further details go in the sample documentation itself.
 
+* :zephyr:code-sample:`nxp_mcu_poweroff`
+
 Other notable changes
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