doc: Document how to skip TLS peer verification

Ticket: MEN-8351

Signed-off-by: Lluis Campos <[email protected]>

Author: lluiscampos

target/zephyr/Kconfig

@@ -469,7 +469,7 @@ if MENDER_MCU_CLIENT
                 range 0 2
                 default 2
                 help
-                    Peer verification level for TLS connection.
+                    Peer verification level for TLS connection. For testing purposes, set to 0 to skip TLS peer verify
 
         endmenu