👽 Compat(termopen): update deprecated api call for termopen

Use the recommended vim.fn.jobstart over deprecated vim.fn.termopen

Please let me know if this causes any issues with older nvim versions.
In my testing it seems to work well but I can implement a version check
if needed for compatibility on older installs.

Author: rootiest

lua/nvim_updater/utils.lua

@@ -293,7 +293,8 @@ function U.open_floating_terminal(command_or_opts, filetype, ispreupdate, autocl
 	end
 
 	-- Run the terminal command
-	vim.fn.termopen(command, {
+	vim.fn.jobstart(command, {
+		term = true, -- Use terminal mode
 		on_stdout = function(_, data)
 			if data then
 				for _, line in ipairs(data) do