fix(ci): fix tests using old nvim api

[pysan3]

vim.api.nvim_win_get_config used to return a dict of numbers to represent a vim float number for row and col fields. This behavior was fixed in https://github.com/neovim/neovim/pull/27284 as a breaking change to the old API without any notice. Now user can refer to the value of config.row without indexing like config.row[vim.val_idx].

This is the reason why tests are failing in https://github.com/MunifTanjim/nui.nvim/pull/332.

[pysan3]

Haha, devs are soo bad at writing docs lol.

This is the only mention in the docs referring to this breaking change.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (35da9ca) 99.04% compared to head (9f7c5ff) 99.04%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #333 +/- ## ======================================= Coverage 99.04% 99.04% ======================================= Files 20 20 Lines 2725 2725 ======================================= Hits 2699 2699 Misses 26 26 ```

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[MunifTanjim]

Thanks for looking into it 🙌🏼