twrpme: Add command to disable AVB via fastboot

Change-Id: Icdd3865647c637f06aba3819126504355a419fcf
diff --git a/_includes/avb.html b/_includes/avb.html
index 6a49ee3..673cc15 100644
--- a/_includes/avb.html
+++ b/_includes/avb.html
@@ -1,3 +1,9 @@
 <div class='page-heading'>This device uses Android Verified Boot (AVB)</div>
 <hr />
 <p class="text">This means that installing TWRP or swiping to allow system modifications will prevent you from being able to boot. To bypass AVB's boot prevention, you will have to disable it or install a custom ROM that ships with disabled AVB.</p>
+
+To disable AVB via fastboot, grab the vbmeta image from the ROM you are on, and flash it with the following command:
+
+<code>fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img</code>
+
+AVB should be now disabled on your device.