Language is hard-coded as Korean

[couladin]

Nice tool! My installation is in LazyVim and done using the lazy.vim install instructions.

I notice that when I send a post, the language is set to Korean. Changing it is not mentioned in the README, and will cause issues for people who filter Mastodon content based on language.

I think it's due to it being hard-coded in api_client.lua on line 406:

mastodon.nvim/lua/mastodon/api_client.lua

Lines 399 to 407 in 605cd44

	body = vim.fn.json_encode({
	status = message,
	media_ids = {},
	sensitive = false,
	spoiler_text = "",
	visibility = vim.g.mastodon_toot_visibility or "unlisted",
	poll = nil,
	language = "ko",
	}),

It would be great if it was possible for users to configure their preferred language in their configuration.