Update release note label

Remove Dublin reference
Update Overview.rst adding El Alto line in Release table

Issue-ID: DOC-554

Signed-off-by: Eric Debeau <eric.debeau@orange.com>
Change-Id: I14af0d147dea4a506da948f29b6a508293b3af68
(cherry picked from commit ddbab33a17a86bba7c45cb53064bde2a9fba8287)
diff --git a/docs/index.rst b/docs/index.rst
index fc772b8..4b62623 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -21,9 +21,9 @@
 Please find some guidance here on the content of ONAP documentation:
 
  +---------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------+
- | Main documentation areas 	                                                   | Description                                                                                   |
+ | Main documentation areas                                                        | Description                                                                                   |
  +=================================================================================+===============================================================================================+
- | :ref:`Release Notes <dublinrelease-notes>`                                      | The Release Notes besides providing the basic information on the main release, also           |
+ | :ref:`Release Notes <release-notes>`                                            | The Release Notes besides providing the basic information on the main release, also           |
  |                                                                                 | presents link to the release information of each, specific ONAP component.                    |
  +---------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------+
  | :ref:`ONAP Overview <overview>`                                                 | ONAP Overview provides generic and high-level guidance on the mission and main                |