[VOL-5362] Fix extlinks in Voltha 2.12 relnotes

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I11bd25cf8b1a743b210389686c74fef811169a4b
diff --git a/overview/contributing/copyright.rst b/overview/contributing/copyright.rst
index 6d9eae7..08dabb0 100644
--- a/overview/contributing/copyright.rst
+++ b/overview/contributing/copyright.rst
@@ -9,6 +9,7 @@
   - Copyright notice should be dated to the last year sources were modified.
 
 .. code-block:: BASH
+
    :caption: Project Copyright Notice
 
    # -----------------------------------------------------------------------
@@ -39,4 +40,4 @@
 - `ONF CLA Information <https://wiki.opencord.org>`_
 - `Contributing License Agreement Manager <https://cla.opennetworking.org/>`_
 
-`Copyrights <copyright/copyright>`_
+:doc:`Copyrights <copyright/copyright>`