[VOL-5329] - Update copyright docs to mention SPDX

overview/contributing/copyright.rst
overview/contributing/copyright/Makefile.rst
overview/contributing/copyright/copyright.rst
overview/contributing/copyright/golang.rst
overview/contributing/copyright/json.rst
overview/contributing/copyright/markdown.rst
---------------------------------------------
  o Add examples of copyright notice in source.
  o json syntax most difficult to add.
  o Document SPDX tokens.
  o Creat a containing folder copyright/ so documentation setup can be modular.

conf.py
release_notes/voltha_2.12.rst
-----------------------------
  o Sphinx replace:: feature stopped working, linkcheck reports broken urls.
  o Move mvn-* and jira string templates into conf.py as ext links.
  o Replace |token| with :token:.
  o Also shorten several verbatim URLs with :vol-{ger,git}: extlinks.

Change-Id: I0f9ec3f4354044968805da1872fc9f6bd864996f
Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
diff --git a/overview/contributing/copyright/json.rst b/overview/contributing/copyright/json.rst
new file mode 100644
index 0000000..18b0776
--- /dev/null
+++ b/overview/contributing/copyright/json.rst
@@ -0,0 +1,16 @@
+Copyright Notice: Json syntax
+=============================
+
+.. code-block:: JSON
+   :caption: Copyright Syntax
+
+   {
+      {
+          "name": "sample-json-syntax",
+          "version": 1,
+      },
+      "copyright-notice" : {
+          "SPDX-FileCopyrightText" : "2024 Open Networking Foundation Contributors",
+          "SPDX-License-Identifier" : "Apache-2.0"
+      }
+   }