CPS Temporal documentation is not generated anymore

Generated doc is not in sync with repo rst files.

For master:

• https://github.com/onap/cps-cps-temporal/blob/master/docs/content/release-notes.rst
• https://docs.onap.org/projects/onap-cps-cps-temporal/en/latest/content/release-notes.html

From Istanbul:

• https://github.com/onap/cps-cps-temporal/blob/istanbul/docs/content/release-notes.rst
• https://docs.onap.org/projects/onap-cps-cps-temporal/en/istanbul/content/release-notes.html