Enabling PKVM requires bootloader unlocking

Bug: N/A
Test: N/A
Change-Id: I052ad516903dba7949f97b2118013ffbbfc89d51
diff --git a/docs/getting_started/index.md b/docs/getting_started/index.md
index 562c285..2f28739 100644
--- a/docs/getting_started/index.md
+++ b/docs/getting_started/index.md
@@ -39,6 +39,7 @@
 
 ```shell
 adb reboot bootloader
+fastboot flashing unlock
 fastboot oem pkvm enable
 fastboot reboot
 ```