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/maintainers.rst b/docs/contributing/maintainers.rst
index aeced91..ced48d1 100644
--- a/docs/contributing/maintainers.rst
+++ b/docs/contributing/maintainers.rst
@@ -111,8 +111,8 @@
     :github: `jamike <https://github.com/jamike>`__
 
 
-Infineon/Cypress Platform:
-~~~~~~~~~~~~~~~~~
+Infineon/Cypress Platforms
+~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Chris Brand
     :email: `Chris Brand@cypress.com <chris.brand@cypress.com>`__