fix(haskell): update query for tree-sitter-haskell v0.21.0 rewrite

[mrcjkb]

See:

• https://github.com/nvim-treesitter/nvim-treesitter/pull/6580
• https://github.com/tree-sitter/tree-sitter-haskell/pull/120

This should be equivalent. I don't use this myself, and I don't have a fixture to reference, so I can't know for sure :smile:

[laytan]

Thanks! Merging because tests are just broken in general atm and the patch looks good