update readme - base-noprelude warning, remove stray bullet point

[theGhostJW]

Moving a project to relude it took a while before I realised that base-noprelude was preventing cabal from building. Until such time as base-noprelude is being actively maintained I think there should be a warning against its use.

Also removed stay bullet point next to video.

partly addresses https://github.com/kowainik/relude/issues/396 => https://github.com/kowainik/relude/issues/396#issuecomment-1099112894

Resolves #396

Checklist:

HLint

• [ ] I've changed the exposed interface (add new reexports, remove reexports, rename reexported things, etc.).
  • [ ] I've updated hlint.dhall accordingly to my changes (add new rules for the new imports, remove old ones, when they are outdated, etc.).
  • [ ] I've generated the new .hlint.yaml file (see this instructions).

General

• [ ] I've updated the CHANGELOG with the short description of my latest changes.
• [ ] All new and existing tests pass.
• [ ] I keep the code style used in the files I've changed (see style-guide for more details).
• [ ] I've used the stylish-haskell file.
• [x] My change requires the documentation updates.
  • [x] I've updated the documentation accordingly.
• [ ] I've added the [ci skip] text to the docs-only related commit's name.