docs: about section in a single page

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I1bf9a9cbb7ad61c20bdd5cee110d9e8ec2c6988e
diff --git a/docs/index.rst b/docs/index.rst
index f02451d..d29a909 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -6,7 +6,7 @@
    :numbered:
 
    Home<self>
-   about/index
+   about
    getting_started/index
    design/index
    threat_model_spm