Typo in filename for `kotlin-lsp` config

[jithu7432]

Description

The configuration for kotlin-lsp is in lsp/kotlin_lsp.lua which raises this error when enabled.

- ⚠️ WARNING 'kotlin-lsp' config not found. Ensure that vim.lsp.config('kotlin-lsp') was called.

[justinmk]

This is an error in your config as explained in #4001 (comment)

LS program names can be any random thing, and is unrelated to the config name, which often can't be exactly the same as the LS program name, for various reasons.

[jithu7432]

Right, and the configs.md correctly mentions the lsp as kotlin_lsp. Thanks