Docs: Link the Docs + Small Fixes

Change-Id: I2995d3ae8718f1496687e6772c80b033e6da34e6
Signed-off-by: Elena Uziunaite <elena.uziunaite@arm.com>
diff --git a/docs/index.rst b/docs/index.rst
index 874c78a..a4b0190 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -6,7 +6,7 @@
 
 .. toctree::
   :caption: Overview
-  :maxdepth: 1
+  :titlesonly:
 
   CMSIS TF-M Packs <cmsis_pack>
   Code Size Analyze Tool <code-size-analyze-tool>
@@ -26,6 +26,8 @@
   :hidden:
 
   Trusted Firmware-M <https://trustedfirmware-m.readthedocs.io/en/latest/>
+  TF-M Tests <https://trustedfirmware-m.readthedocs.io/projects/tf-m-tests/en/latest/>
+  TF-M Extras <https://trustedfirmware-m.readthedocs.io/projects/tf-m-extras/en/latest/>
 
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