docs(juno): fix broken link

The URL of the Juno Getting Started Guide has been changed.
Fix the broken link.

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I55697f2f1f787c32d1ea7dfcf9eda619906cdb5d
diff --git a/docs/plat/arm/juno/index.rst b/docs/plat/arm/juno/index.rst
index 8b9d453..91e681f 100644
--- a/docs/plat/arm/juno/index.rst
+++ b/docs/plat/arm/juno/index.rst
@@ -241,13 +241,13 @@
 
 --------------
 
-*Copyright (c) 2019-2021, Arm Limited. All rights reserved.*
+*Copyright (c) 2019-2022, Arm Limited. All rights reserved.*
 
 .. _Linaro release software stack: http://releases.linaro.org/members/arm/platforms/
 .. _Juno platform software user guide: https://git.linaro.org/landing-teams/working/arm/arm-reference-platforms.git/about/docs/juno/user-guide.rst
 .. _TF-A downloads page: https://downloads.trustedfirmware.org/tf-a/css_scp_2.8.0/juno/
 .. _build the binaries from source: https://github.com/ARM-software/SCP-firmware/blob/master/user_guide.md#scp-firmware-user-guide
 .. _Arm Platforms Portal: https://community.arm.com/dev-platforms/
-.. _Juno Getting Started Guide: http://infocenter.arm.com/help/topic/com.arm.doc.dui0928e/DUI0928E_juno_arm_development_platform_gsg.pdf
+.. _Juno Getting Started Guide: https://developer.arm.com/documentation/den0928/f/?lang=en
 .. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf
 .. _Juno Arm Development Platform: http://www.arm.com/products/tools/development-boards/versatile-express/juno-arm-development-platform.php