Format CDS index page

Change-Id: If12d982ed30564ff26b6ef8de281f37e43d7327a
Issue-ID: CCSDK-917
Signed-off-by: Ezhilarasi <ezhrajam@in.ibm.com>
diff --git a/docs/index.rst b/docs/index.rst
index c16fee5..b5a9576 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -14,7 +14,7 @@
 This makes SERVICE PROVIDER(S) more responsive to its customers and able to deliver products that more closely match the needs of its customers.
 
 Design tools:
--------------
+=============
 .. toctree::
    :maxdepth: 1
    :glob: