fix: prevent panic in ShowBanner when update check regex finds no match

[amirhossein-karimi]

Bug: ShowBanner panics when update check regex finds no match

Description

Running fallparams against a URL can cause a runtime panic:

go run . -u "https://varzesh3.com"

output
panic: runtime error: index out of range [1] with length 0

goroutine 1 [running]:
github.com/ImAyrix/fallparams/funcs/utils.ShowBanner(...)
funcs/utils/utils.go:61
main.main()
main.go:73
exit status 2

suggest fix
matches := re.FindStringSubmatch(body)

msg := fmt.Sprintf("an %soutdated%s", colorRed, colorReset)

if len(matches) > 1 && matches[1] == version {
    msg = fmt.Sprintf("the %slatest%s", colorGreen, colorReset)
}