Create or update the RHODS release notes for RHODS_1.28.0_GA.

For instructions, see the "Creating the Red Hat OpenShift Data Science release notes" google doc: https://docs.google.com/document/d/1Em3dzsOl-KFnFOxjlocZQdZiDfzSQ29hpVhOQMPLZ_I/edit#heading=h.ufnsm8xd9n0q

Coordinate with the QE team and use the following filter to identify bug fixes and known issues:
https://issues.redhat.com/secure/RapidBoard.jspa?rapidView=8608&selectedIssue=RHODS-5215&quickFilter=93158