design: Fix UUID TLVs

Fix values presented in the design.md for UUID TLVs.

Signed-off-by: Tomasz Chyrowicz <tomasz.chyrowicz@nordicsemi.no>

Author: tomchy

docs/design.md

@@ -150,8 +150,8 @@ struct image_tlv {
                                              * ...
                                              * 0xffa0 - 0xfffe
                                              */
-#define IMAGE_TLV_UUID_VID          0x80    /* Vendor unique identifier */
-#define IMAGE_TLV_UUID_CID          0x81    /* Device class unique identifier */
+#define IMAGE_TLV_UUID_VID          0x74    /* Vendor unique identifier */
+#define IMAGE_TLV_UUID_CID          0x75    /* Device class unique identifier */
 ```
 
 Optional type-length-value records (TLVs) containing image metadata are placed