Update samples/ironside_se/protectedmem_periphconf/sample.yaml

Co-authored-by: Karsten König <karsten.koenig.030@gmail.com>

Author: SebastianBoe

samples/ironside_se/protectedmem_periphconf/sample.yaml

@@ -5,7 +5,7 @@ sample:
     The sample relocates periphconf_partition to be right after
     cpuapp_boot_partition and configures PROTECTEDMEM to protect both partitions.
     The sample writes to the protected area, reboots, and demonstrates that the
-    integrity check fails on boot, preventing the device from booting when the
+    integrity check fails on boot, preventing the device from booting into the primary image when the periphconf partition is tampered with.
     protected memory is modified.
 
 common: