Fix Sony Bootloader comment (#54)

* Fix Sony Bootloader 

It supports custom AVB,
And doesn't really void warranty

* Sony: Move avb notice.

---------

Co-authored-by: melontini <104443436+melontini@users.noreply.github.com>

brands/sony/README.md

@@ -7,7 +7,7 @@ Sony has an open policy for software developers:
 - Jolla provides first-class support for installing [Sailfish OS] on select Xperias.
 
 Since Sony likes to ruin a perfect thing:
-- Sony requires you to request an unlock code from their [Unlock Service]. They can pull the plug anytime. You have to send your IMEI and agree to warranty voiding.
+- Sony requires you to request an unlock code from their [Unlock Service]. They can pull the plug anytime. You have to send your IMEI and agree to possible warranty voiding (many have had their phones repaired/replaced under warranty even after unlocking, just simply flash stock and lock before doing warranty).
 
 Some carrier locked and US devices can never be unlocked. On Sony devices ([but not all?][service-menu-gone]) you can check if the bootloader is unlockable using the service menu.
 
@@ -16,11 +16,14 @@ Some carrier locked and US devices can never be unlocked. On Sony devices ([but
 3. Under Rooting Status look for "Bootloader unlock allowed"
 4. If "Yes", then the device is unlockable.
 
+Sony supports [Custom AVB](/README.md#custom-avb-keys) Since 2020.
+
 ***
+
 Additional info provided by [K4sum1](https://github.com/K4sum1).<br/>
 Authored by [konradmb](https://github.com/konradmb).
 
 [Sony Open Devices Program]:https://developer.sony.com/open-source/aosp-on-xperia-open-devices
 [Sailfish OS]:https://shop.jolla.com/
 [Unlock Service]:https://developer.sony.com/open-source/aosp-on-xperia-open-devices/get-started/unlock-bootloader
-[service-menu-gone]:https://www.reddit.com/r/SonyXperia/comments/qir0ze/what_happened_to_the_service_menu/
+[service-menu-gone]:https://www.reddit.com/r/SonyXperia/comments/qir0ze/what_happened_to_the_service_menu/