Use vim.filetype.add over creating an autocmd

.config/nvim/lua/config/autocmds.lua

@@ -57,17 +57,11 @@ Autocmd('BufEnter', {
 	end,
 })
 
----@type table<string, string>
-local filemap = {
-	['*.h'] = 'c',
-	['*/i3/**.conf'] = 'i3config'
-}
-
-for pat, file in pairs(filemap) do
-	Autocmd('BufRead', {
-		pattern = pat,
-		callback = function()
-			vim.bo.filetype = file
-		end
-	})
-end
+vim.filetype.add({
+	extension = {
+		h = 'c',
+	},
+	pattern = {
+		['${XDG_CONFIG_HOME}/i3/.*%.conf'] = 'i3config'
+	}
+})