Remove null-ls from recommended linters and formatters

[kblissett]

I've searched open issues for similar requests

• [X] Yes

Is your feature request related to a problem? Please describe.

Apologies if this has already been raised, but null-ls has now been archived and is no longer maintained. Perhaps it should be removed as a recommended plugin in the README as there are already alternatives mentioned.

Describe the solution you'd like

Remove mentions of null-ls from the README

Describe potential alternatives you've considered

No response

Additional context

No response

[mercxry]

Perhaps none-ls.nvim could be suggested instead of null-ls, since it is the drop-in replacement for it, with the only difference that it is actively maintained 😃

[pidgeon777]

I thought that none-ls.nvim was already supported, at first.

[Lazerbeak12345]

I've been using efm to great success.