Hello

As noticed in the following changes
https://git.opendaylight.org/gerrit/c/docs/+/96421
https://git.opendaylight.org/gerrit/c/docs/+/97278

autogeneration scripts for SR release notes do not pass the docs gate anymore since Sphinx option -W enforce warnings treatments as error.
The script muste be updated to append the new page reference to the file docs/release-notes/index.rst