Make CI green again

[Bodigrim]

• Fix i386 job, otherwise it fails with

  [ Error ] [
  [ ...   ] Set error was: The version 2.11.1 of the tool stack is not installed.
  [ Error ] Also check the logs in /github/home/.ghcup/logs

• Fix CentOS job, it seems something is off with GHC 9.4.7 bindist, so let's stick to the previous recommended version:

[ Info  ] Installing GHC (this may take a while)
[ Error ] [./configure",
[ ...   ]                              "--prefix=/github/home/.ghcup/ghc/9.4.7"] failed with exit code 1.