Docs: Restructure the documents

Restructure the file category to let it more friendly to users.

Signed-off-by: Summer Qin <summer.qin@arm.com>
Change-Id: I7ced0e2d700ce03423e472e0098608f3445ba169
diff --git a/docs/contributing/code_review_guide.rst b/docs/contributing/code_review_guide.rst
index 8bbf33a..e9ed969 100644
--- a/docs/contributing/code_review_guide.rst
+++ b/docs/contributing/code_review_guide.rst
@@ -13,9 +13,9 @@
 **********************
 The prerequisites before going to the review stage:
 
-- Read the :doc:`Contributing Guidelines </docs/contributing/contributing>`
+- Read the :doc:`Contributing Process </docs/contributing/contributing_process>`
   to know basic concepts.
-- Read the :doc:`Source Structure </docs/design_documents/source_structure>`
+- Read the :doc:`Source Structure </docs/technical_references/source_structure>`
   for structure related reference.
 
 The review guidelines consist of these items:
@@ -234,4 +234,4 @@
 
 --------------
 
-*Copyright (c) 2020, Arm Limited. All rights reserved.*
+*Copyright (c) 2020-2021, Arm Limited. All rights reserved.*