nvim: Update treesitter context plugin source

Seems to have since been transferred to nvim-treesitter group ownership.
Probably still worked under the old link, but better to be safe and use
the up-to-date source.

Have gotten LSP, Linters, Treesittesr into one list under core/languages

Missing formatters still, then it's done.

nvim/.config/nvim/lua/plugins/treesitter.lua

@@ -5,7 +5,7 @@ return {
 		-- show current cursor context at top of buffer
 		-- improves commenting plugin above by using ts
 		dependencies = {
-			{ "romgrk/nvim-treesitter-context", config = true },
+			"nvim-treesitter/nvim-treesitter-context",
 			"JoosepAlviste/nvim-ts-context-commentstring",
 			"RRethy/nvim-treesitter-textsubjects",
 			"windwp/nvim-ts-autotag",