CI: Add GHC 9.8 jobs

@mpickering: Do you think it's an appropriate time to drop the GHC 9.2 jobs?

Yes, I think it is time.

approved this merge request

added 3 commits

• dbd53c8c - CI: Remove GHC 9.2 jobs
• e9d433e7 - Update README to mention supported GHCs
• 46aa83d3 - Update ghcide-2.0.0.0 patch to build with GHC 9.8

Compare with previous version

enabled an automatic merge when the pipeline for 46aa83d3 succeeds

merged

mentioned in merge request !275 (closed)