Bug-fix release.

Changes:

- Improvements to RHEL packaging [duncanmmacleod/dqsegdb2!57]
- Simplify requests usage with igwn-auth-utils 1.0.0 [duncanmmacleod/dqsegdb2!59]

For full details of this release, please see
<https://git.ligo.org/duncanmmacleod/dqsegdb2/-/releases/1.2.1>