doc: readme-zephyr: fix the scratch partition example

It tells about adding the 24KB scratch partition,
not about storage partition.
Updates the used path to HWMv2.

Signed-off-by: Andrej Butok <andrey.butok@nxp.com>
diff --git a/docs/readme-zephyr.md b/docs/readme-zephyr.md
index a8f351d..1e55ea7 100644
--- a/docs/readme-zephyr.md
+++ b/docs/readme-zephyr.md
@@ -174,7 +174,7 @@
 4KB, 8KB, 12KB, 16KB are allowed, 7KB, 7.5KB are not. This scratch partition
 needs adding to the .dts file for the board, e.g. for the nrf52dk_nrf52832
 board thus would involve updating
-`<zephyr>/boards/arm/nrf52dk_nrf52832/nrf52dk_nrf52832.dts` with:
+`<zephyr>/boards/nordic/nrf52dk/nrf52dk_nrf52832.dts` with:
 
 ```
     boot_partition: partition@0 {
@@ -189,8 +189,8 @@
         label = "image-1";
         reg = <0x00043000 0x37000>;
     };
-    storage_partition: partition@7a000 {
-        label = "storage";
+    scratch_partition: partition@7a000 {
+        label = "image-scratch";
         reg = <0x0007a000 0x00006000>;
     };
 ```