fanquake 211736697b ci: use OpenBSD 7.2 over 7.1
In the most recent CI run, all the OpenBSD CI jobs failed, i.e
https://github.com/libevent/libevent/actions/runs/4876367885/jobs/8699759831,
this seems to be due to the fact that packages for 7.1 have been removed
from https://cdn.openbsd.org/pub/OpenBSD/ (only has 7.2 & 7.3):
```bash
  Config file: openbsd-7.1.conf
  https://cdn.openbsd.org/pub/OpenBSD/7.1/packages/amd64/: no such dir
  Can't find rsync-3.2.3p0
  Couldn't install rsync-3.2.3p0
  exec shell: bash run.sh showDebugInfo
```

Switch to using 7.2, which is available, so that the CI will run.
2023-05-04 21:20:23 +02:00
..
2023-05-04 21:20:23 +02:00